Patent Publication Number: US-2022215056-A1

Title: Drill back to original audio clip in virtual assistant initiated lists and reminders

Description:
TECHNICAL FIELD 
     The present disclosure relates to virtual assistants. In particular, the present disclosure relates to providing an original audio recording of audio input that caused a virtual assistant to create content intended to be reviewed in the future. 
     BACKGROUND 
     A virtual assistant is a software agent used to perform tasks. A virtual assistant may accept an instruction from a user via voice commands and/or text commands. Voice commands may be received by a smart speaker. Alternatively, a virtual assistant may receive commands from a user via text commands typed into a chat interface. Generally, a virtual assistant executes a simple task responsive to a request. For example, responsive to the voice command “What is the weather like today?” a virtual assistant obtains, and reads, today&#39;s weather forecast. 
     The virtual assistant may also be used to create content, such as lists and reminders, that a user intends to review at a future time. For example, a user may add items to a shopping list with the intention of reviewing the list contents at a supermarket. As another example, a user may provide a voice command “Remind me to call John at noon tomorrow,” with the intention to review that reminder when it is presented at noon the following day. 
     The virtual assistant may use a particular application or module for executing a specific task. As examples, virtual assistants invoke stand-alone applications to find directions, check the weather, and update a calendar. A virtual assistant may determine the user&#39;s intent to identify a task to execute. The virtual assistant may determine the intent using sample utterances. As an example, an application called lookupBalance is invoked based the sample utterance, “What is the balance of my checking account?”. 
     The approaches described in this section are approaches that could be pursued, but not necessarily approaches that have been previously conceived or pursued. Therefore, unless otherwise indicated, it should not be assumed that any of the approaches described in this section qualify as prior art merely by virtue of their inclusion in this section. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The embodiments are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and they mean at least one. In the drawings: 
         FIG. 1  illustrates a system in accordance with one or more embodiments; 
         FIG. 2  illustrates an example set of operations for drilling back to audio recordings using a virtual assistant in accordance with one or more embodiments; 
         FIG. 3  illustrates an example device using a virtual assistant platform in accordance with one or more embodiments; and 
         FIG. 4  shows a block diagram that illustrates a computer system in accordance with one or more embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding. One or more embodiments may be practiced without these specific details. Features described in one embodiment may be combined with features described in a different embodiment. In some examples, well-known structures and devices are described with reference to a block diagram form in order to avoid unnecessarily obscuring the present invention. 
     1. GENERAL OVERVIEW 
     2. VIRTUAL ASSISTANT SYSTEM 
     3. DRILL BACK TO AUDIO RECORDING IN VIRTUAL ASSISTANT 
     4. EXAMPLE EMBODIMENT 
     5. MISCELLANEOUS; EXTENSIONS 
     6. HARDWARE OVERVIEW 
     1. General Overview 
     One or more embodiments replay previously received audio input that was used for configuring or scheduling a task. In an example, a virtual assistant receives an initial command from a user, via audio input, to perform a task. The task may include, for example, setting a reminder to do something at a particular time. The virtual assistant stores the audio input in association with information corresponding to the task. Subsequent to performing the task, the virtual assistant receives a request to provide additional information corresponding to the initial command. The virtual assistant identifies the stored audio input based on a stored mapping between information corresponding to the task and the audio input. The virtual assistant then plays the audio input, received from the user, back to the user. 
     The storage and playback of the audio input may be useful when the task performed by the virtual assistant is insufficient and/or incorrect. In an example, an initial command spoken by a user includes “remind me to call Joe at 5 pm”. The virtual assistant misinterprets the initial command and instead plays a reminder at 5 pm that states “this is a reminder to call Mo.” Not recognizing the reminder, the user may submit a request for the playback of the initial command. When the initial command, received from the user, is played to the user, the user is able to understand that the reminder is for calling Joe, not Mo. The initial command may also specify details that were not included in the reminder played by the virtual assistant. In an example, the initial command may have stated “remind me to call Larry to talk about the sale of the house” while the reminder played by the virtual assistant may have only stated “this is a reminder to call Larry.” Accordingly, storage and playback of the initial command by the virtual assistant helps the user obtain additional information relevant to the reminder task. 
     In another example, an initial command spoken by a user includes “add treat to my grocery list.” The virtual assistant misinterprets the initial command and adds “wheat” to the user&#39;s grocery list. At a later time, when the user is viewing the grocery list and sees “wheat” on the grocery list, the user requests additional information regarding the “wheat” entry within the grocery list. Based on a stored mapping between the “wheat” entry and the stored initial command, the virtual assistant identifies the initial command for playback. The system plays back the user&#39;s initial command “add treat to my grocery list” which in turn helps the user identify the correct item to be purchased. 
     One or more embodiments play or present any contextual information associated with the receipt of the initial command from a user. As an alternative to or in addition to the playback of the initial command, the virtual assistant may (a) present the geo-location of the user and/or the virtual assistant when the initial command was received, or (b) the time at which the initial command was received. The virtual assistant may present device information corresponding to a time at which the initial command was received. The device information may include, for example, the set of applications being executed when the initial command was received, the last application accessed by the user prior to receipt of the initial command, or a configuration of the device when the initial command was received. 
     One or more embodiments described in this Specification and/or recited in the claims may not be included in this General Overview section. 
     2. Virtual Assistant System 
       FIG. 1  illustrates a system  100  in accordance with one or more embodiments. As illustrated in  FIG. 1 , system  100  includes a query system  102 , user communication device  118 , and data repository  126 . In one or more embodiments, the system  100  may include more or fewer components than the components illustrated in  FIG. 1 . The components illustrated in  FIG. 1  may be local to or remote from each other. The components illustrated in  FIG. 1  may be implemented in software and/or hardware. Each component may be distributed over multiple applications and/or machines. Multiple components may be combined into one application and/or machine. Operations described with respect to one component may instead be performed by another component. 
     In one or more embodiments, the system  100  executes a task, based on input from a user  124 . Example tasks include making a travel arrangement, giving directions, displaying a requested image, setting reminders, creating shopping lists and adding items to those lists. One or more steps in a task may be executed based on a dialogue with the user  124 . A dialogue may comprise inputs received from the user  124  and outputs generated by the system  100 . The dialogue may include an initial request from the user  124 . The dialogue may include a response, from the system  100 , that resolves the user request. The dialogue may include a request, generated by system  100 , for additional information from the user  124 . 
     In one or more embodiments, the user communication device  118  includes hardware and/or software configured to facilitate communication with the user  124 . The user communication device  118  may receive information from the user  124 . The user communication device  118  may transmit information to the user  124 . The user communication device may facilitate communication with the user  124  via an audio interface  120  and/or a visual interface  122 . The user communication device  118  is communicatively coupled to query system  102 . 
     In an embodiment, the user communication device  118  is implemented on one or more digital devices. The term “digital device” generally refers to any hardware device that includes a processor. A digital device may refer to a physical device executing an application or a virtual machine. Examples of digital devices include a computer, a tablet, a laptop, a desktop, a netbook, a server, a web server, a network policy server, a proxy server, a generic machine, a function-specific hardware device, a hardware router, a hardware switch, a hardware firewall, a hardware firewall, a hardware network address translator (NAT), a hardware load balancer, a mainframe, a television, a content receiver, a set-top box, a printer, a mobile handset, a smartphone, a personal digital assistant (“PDA”), a wireless receiver and/or transmitter, a base station, a communication management device, a router, a switch, a controller, an access point, and/or a client device. 
     In an embodiment, the user communication device  118  is a smart speaker. The smart speaker receives audio data from user  124 . The smart speaker plays audio. The smart speaker transmits information to and from query system  102 . The smart speaker may be implemented as a stand-alone device, or as part of a smart device such as a smartphone, tablet, or computer. 
     In one or more embodiments, audio interface  120  refers to hardware and/or software configured to facilitate audio communication between user  124  and the user communication device  118 . The audio interface  120  may include a speaker to play audio. The played audio may include verbal questions and answers comprising a dialogue. The audio interface may include a microphone to receive audio. The received audio may include requests and other information received from the user  124 . 
     In one or more embodiments, visual interface  122  refers to hardware and/or software configured to facilitate visual communications between a user and the user communication device  118 . The visual interface  122  renders user interface elements and receives input via user interface elements. Examples of visual interfaces include a graphical user interface (GUI) and a command line interface (CLI). Examples of user interface elements include checkboxes, radio buttons, dropdown lists, list boxes, buttons, toggles, text fields, date and time selectors, command lines, sliders, pages, and forms. 
     The visual interface  122  may present a messaging interface. The messaging interface may be used to accept typed input from a user (e.g., via a keyboard coupled to the user communication device  118  and/or a soft keyboard displayed via the visual interface). The messaging interface may be used to display text to the user  124 . The visual interface  122  may include functionality to display images, such as maps and pictures. The visual interface  122  may include functionality to upload an image. As an example, the user  124  uploads a picture of an animal, along with the text, “What is this?”. 
     In an embodiment, the query system  102  is a system for executing one or more tasks, responsive to input from the user  124  via user communication device  118 . The query system  102  may receive voice input, text input, and/or images, from the user communication device  118 . 
     The query system  102  may include a speech recognition component  108  for converting voice input to text using speech recognition techniques. The speech recognition component  108  may digitize and/or filter received voice input. The speech recognition component  108  may compare the voice input to stored template sound samples to identify words or phrases. The speech recognition component  108  may separate the voice input into components for comparison with sounds used in a particular language. 
     In an embodiment, one or more components of the speech recognition component  108  use a machine learning engine  110 . In particular, the machine learning engine  110  may be used to recognize speech and determine a meaning associated therewith. Machine learning includes various techniques in the field of artificial intelligence that deal with computer-implemented, user-independent processes for solving problems that have variable inputs. 
     In some embodiments, the machine learning engine  110  trains a machine learning model  112  to perform one or more operations. Training a machine learning model  112  uses training data to generate a function that, given one or more inputs to the machine learning model  112 , computes a corresponding output. The output may correspond to a prediction based on prior machine learning. In an embodiment, the output includes a label, classification, and/or categorization assigned to the provided input(s). The machine learning model  112  corresponds to a learned model for performing the desired operation(s) (e.g., labeling, classifying, and/or categorizing inputs). As a particular example, training may include causing an individual speaker to read particular text or isolated vocabulary into the system. The system analyzes the speaker&#39;s specific voice and uses it to fine-tune the recognition of that person&#39;s speech. 
     In an embodiment, the machine learning engine  110  may use supervised learning, semi-supervised learning, unsupervised learning, reinforcement learning, and/or another training method or combination thereof. In supervised learning, labeled training data includes input/output pairs in which each input is labeled with a desired output (e.g., a label, classification, and/or categorization), also referred to as a supervisory signal. In semi-supervised learning, some inputs are associated with supervisory signals and other inputs are not associated with supervisory signals. In unsupervised learning, the training data does not include supervisory signals. Reinforcement learning uses a feedback system in which the machine learning engine  110  receives positive and/or negative reinforcement in the process of attempting to solve a particular problem (e.g., to optimize performance in a particular scenario, according to one or more predefined performance criteria). In an embodiment, the machine learning engine  110  initially uses supervised learning to train the machine learning model  112  and then uses unsupervised learning to update the machine learning model  112  on an ongoing basis. 
     In an embodiment, a machine learning engine  110  may use many different techniques to label, classify, and/or categorize inputs. A machine learning engine  110  may transform inputs into feature vectors that describe one or more properties (“features”) of the inputs. The machine learning engine  110  may label, classify, and/or categorize the inputs based on the feature vectors. Alternatively or additionally, a machine learning engine  110  may use clustering (also referred to as cluster analysis) to identify commonalities in the inputs. The machine learning engine  110  may group (i.e., cluster) the inputs based on those commonalities. The machine learning engine  110  may use hierarchical clustering, k-means clustering, and/or another clustering method or combination thereof. For example, the machine learning engine  110  may receive, as inputs, one or more parsed query terms, and may identify one or more additional parsed query terms for inclusion in a search based on commonalities among the received parsed query terms. In an embodiment, a machine learning engine  110  includes an artificial neural network. An artificial neural network includes multiple nodes (also referred to as artificial neurons) and edges between nodes. Edges may be associated with corresponding weights that represent the strengths of connections between nodes, which the machine learning engine  110  adjusts as machine learning proceeds. Alternatively or additionally, a machine learning engine  110  may include a support vector machine. A support vector machine represents inputs as vectors. The machine learning engine  110  may label, classify, and/or categorizes inputs based on the vectors. Alternatively or additionally, the machine learning engine  110  may use a naïve Bayes classifier to label, classify, and/or categorize inputs. Alternatively or additionally, given a particular input, a machine learning model may apply a decision tree to predict an output for the given input. Alternatively or additionally, a machine learning engine  110  may apply fuzzy logic in situations where labeling, classifying, and/or categorizing an input among a fixed set of mutually exclusive options is impossible or impractical. The aforementioned machine learning model  112  and techniques are discussed for exemplary purposes only and should not be construed as limiting one or more embodiments. 
     As a particular example, the machine learning engine  110  may be based on a Hidden Markov Model (HMM). The HMM may output a sequence of symbols or quantities. HMMs may be used in speech recognition because a speech signal can be viewed as a piecewise stationary signal or a short-time stationary signal. In a short time-scale (e.g., 10 milliseconds), speech can be approximated as a stationary process. Speech can be thought of as a Markov model for many stochastic purposes. 
     HMMs may be trained automatically and are simple and computationally feasible to use. In speech recognition, the HMM may output a sequence of multi-dimensional real-valued vectors, with a vector output periodically (e.g., every 10 milliseconds). Each vector may include coefficients obtained by applying an algorithm (e.g., a Fourier transform) to a short time window of speech, and using the most significant coefficients. Each word or phoneme may have a different output distribution. A hidden Markov model for a sequence of words or phonemes is made by concatenating the individual trained hidden Markov models for the separate words or phonemes. Decoding of the speech may use an algorithm (e.g., the Viterbi algorithm) to find a best path. 
     Neural networks may also be used in speech recognition. In particular, neural networks have been used in many aspects of speech recognition such as phoneme classification, phoneme classification through multi-objective evolutionary algorithms, and isolated word recognition. 
     Neural networks may be used to estimate the probabilities of a speech feature segment, and allow discriminative training in a natural and efficient manner. In particular, neural networks may be used in pre-processing, feature transformation or dimensionality reduction, step prior to HMM based recognition. Alternatively, recurrent neural networks (RNNs) and/or Time Delay Neural Networks (TDNN&#39;s) may be used. 
     In an embodiment, as a machine learning engine  110  applies different inputs to a machine learning model  112 , the corresponding outputs are not always accurate. As an example, the machine learning engine  110  may use supervised learning to train a machine learning model  112 . After training the machine learning model  112 , if a subsequent input is identical to an input that was included in labeled training data and the output is identical to the supervisory signal in the training data, then output is certain to be accurate. If an input is different from inputs that were included in labeled training data, then the machine learning engine  110  may generate a corresponding output that is inaccurate or of uncertain accuracy. In addition to producing a particular output for a given input, the machine learning engine  110  may be configured to produce an indicator representing a confidence (or lack thereof) in the accuracy of the output. A confidence indicator may include a numeric score, a Boolean value, and/or any other kind of indicator that corresponds to a confidence (or lack thereof) in the accuracy of the output. 
     The speech recognition component  108  may use natural language processing to identify one or more executable commands, based on text generated from the audio input. The query system  102  may parse the text to determine one or more relevant portions of the text. 
     In particular, the speech recognition component may parse the text to locate a wake word or phrase (e.g., a word used to indicate that the user intends to issue a command to the virtual assistant) and a command word or phrase subsequent to the wake word. The query system  102  may identify keywords in the command. The query system  102  may compare the command to template language associated with a task executable by the query system  102 . 
     In an embodiment, the query system  102  is implemented remotely from the user communication device  118 . The query system  102  may execute on a cloud network. Alternatively, the query system  102  may execute locally to the user communication device  118 . The query system  102  may execute tasks or retrieve information from one or more external servers. As an example, the query system  102  may retrieve traffic data from a third-party map application. 
     In an embodiment, the query system  102  includes a context information collector  104  that determines context information associated with a user communication device  118 . The context information collector  104  may receive data from the user communication device  118 . As an example, the query system may query the user communication device  118  to determine a location of the user communication device via a Global Positioning System (GPS) functionality or other geolocation service. As another example, the query system  102  may query the user communication device  102  to determine information regarding a state of the user communication device  118 . In particular, the query system may request the set of applications being executed when the initial command was received, the last application accessed by the user prior to receipt of the initial command, and/or a configuration of the device when the initial command was received. Additionally or alternatively, the query system  102  may query the user communication device  118  to determine a time at which the initial command was received. 
     The query system may, at least in part, rely on user input history  106  in determining operations to execute. In an embodiment, the user input history  106  is a record of user input over the course of one or more dialogues. User input history  106  may include information about the sequence of a series of voice inputs. User input history  106  may categorize user input by type. For example, the user creates a shopping list on Thursdays at 6 pm. 
     The query system  102  may include a command execution component  116  for executing a command based on the received audio input. The command execution component  115  may include executing the command and/or scheduling the command to be executed in the future. 
     The query system  102  may include an audio input storage and retrieval component  114 . The audio input storage and retrieval component  114  may communicate with a data repository  126  for purposes of storing at least a portion of an audio input as audio recording data. In some embodiments, the audio input storage and retrieval component  114  stores audio recording data associated with each received audio input. In other embodiments, the audio input storage and retrieval component  114  stores audio recording data associated with an audio input based on properties of the received audio input. For example, the audio input storage and retrieval component  114  may store the audio recording data in response to a determination that the speech recognition component  108  was unable to determine one or more phonemes of the audio input, or that a confidence level associated with a determination of one or more phonemes falls below a confidence threshold. As another example, the audio input storage and retrieval component  114  may store the audio recording data in response to a determination that the command corresponds to an action to be scheduled for future execution (e.g., a reminder) and/or adding an item to a list. 
     In one or more embodiments, the data repository  126  is any type of storage unit and/or device (e.g., a file system, database, collection of tables, or any other storage mechanism) for storing data. Further, the data repository  126  may include multiple different storage units and/or devices. The multiple different storage units and/or devices may or may not be of the same type or located at the same physical site. Further, a data repository  126  may be implemented or may execute on the same computing system as the query system  102  and/or the user communication device  118 . Alternatively or additionally, a data repository  126  may be implemented or executed on a storage and/or computing system separate from the query system  102  and/or the user communication device  118 . A data repository  126  may be communicatively coupled to the query system  102  and/or the user communication device  118  via a direct connection or via a network. 
     Audio recording data  128  includes at least a portion of the audio recording received from the user communication device as a user command. For example, the audio recording data may include the entirety of the audio data received (e.g., a wake word and a command). As another example, the audio recording data may include less than the entirety of the received audio data (e.g., the command, without the wake word). The audio recording data may be stored in any format that can be reproduced at the user communication device. 
     Context information  130  includes context information associated with a user communication device  118  and/or a user  124  at a time the user issued a command (e.g., at a time when an audio recording is sent from the user communication device  118  to the query system  102 . As examples, the context information may include positional data indicating a location of a user communication device at a time when a command was issued, application information indicating other applications executing at a time when a command was issued and/or a last-accessed application prior to receipt of the command, configuration information indicating a configuration of the device when the initial command was received, timing information indicating a time and/or date when the command was received, and/or other information indicating a state of the user communication device at a time when a command was issued. 
     Scheduled action information  132  may include information associated with an action scheduled to take place at a future time based on a received audio input. For example, the scheduled action information may include a command identifier associated with the scheduled action, a time at which the action is to occur, or other information associated with the scheduled action. 
     Mapping information  134  may include information associating audio recording data and/or context information with a particular command issued by the user. In embodiments, the mapping information associates particular audio recording data and/or particular context data with particular scheduled action information. This data may be used to retrieve stored audio recording data and/or context information responsive to execution of the particular action and/or a request for information associated with a particular command. 
     3. Drill Back to Audio Recording in Virtual Assistant 
       FIG. 2  illustrates an example set of operations for drilling back to an original audio recording using a virtual assistant in accordance with one or more embodiments. One or more operations illustrated in  FIG. 2  may be modified, rearranged, or omitted all together. Accordingly, the particular sequence of operations illustrated in  FIG. 2  should not be construed as limiting the scope of one or more embodiments. 
     In an embodiment, the query system may receive audio input including a request to perform an action (Operation  202 ). The audio input is received via a microphone (e.g., via a user communication device as discussed above) system input. In some embodiments, the audio input includes a wake word (a word that prepares the system to receive a command) in addition to a command (one or more words that causes the system to perform an action). In embodiments, the command may be of a type that causes the system to execute an action but does not provide specific, immediate feedback to a user. 
     The system may parse the audio input to divide the audio input into multiple sections. For example, the system may divide the audio input into a wake word section and a command section. In some embodiments, the system may convert the received audio input to text. The system may process one or more (e.g., each) section the audio input using natural language processing to generate a transcript of the section. In some embodiments, the system may determine, for each section transcribed, a confidence score associated with the transcript of the section. 
     In an embodiment, the system schedules the action to be performed (Operation  204 ). In embodiments, scheduling the action to be performed may include determining an action to be performed based on the received audio input. In some embodiments, the command may be of a type that causes the system to perform an action at a time in the future. In particular, the system may receive a command “Remind me to call John next Thursday at noon.” In response to the command, the system may schedule a reminder that will cause the system to prompt the user with the phrase “Call John” on the following Thursday at 12:00 μm. In some embodiments, the system may provide feedback to the user such as “Reminder set,” or “OK, I&#39;ll remind you,” but may not provide specific feedback in the form of what the reminder text will be. 
     As another example, the command may be of a type that adds an entry to a list. In particular, the system may receive a command “Add milk to my grocery list.” In response, the system may add a list item “milk” to a list. In some embodiments, the system may provide feedback to the user such as “OK, I&#39;ve added it to your list,” without specifying what the list item is. 
     The system may store information (e.g., at least a portion of the audio input and/or context information associated with the user and/or user device) in association with the scheduled action (Operation  206 ). The system may store at least a portion of the audio input. For example, the system may store the entirety of the audio input, a portion of the audio input corresponding to the command, a portion of the audio input that is unable to be interpreted by speech to text processing operating on the system, and/or any other portion of the audio input. Alternatively or additionally, the system may store context information. For example, the context information may include positional data indicating a location of a user communication device at a time when a command was issued, application information indicating other applications executing at a time when a command was issued and/or a last-accessed application prior to receipt of the command, configuration information indicating a configuration of the device when the initial command was received, timing information indicating a time and/or date when the command was received, and/or other information useful for providing context to the command. 
     In embodiments, the system stores a mapping between the command and the stored audio input and/or stored context information. For example, each command may be associated with a particular identifier, and the identifier may be stored in combination with the audio input and/or context information. 
     In embodiments, the system may store the audio input and/or the context information based on one or more properties of the audio input. For example, the system may determine a command type associated with the audio input. The system may determine whether or not to store the audio input and/or the context information based on the command type. 
     In some embodiments, the system may store the audio input and/or the context information based on the confidence score of the transcript the audio input. For example, the system may store the audio input and/or the context information based on a determination that a confidence score associated with at least one section of the audio input does not exceed a particular threshold. 
     In some embodiments, storing the at least a portion of the audio input comprises storing the entirety of the audio input. In some embodiments, storing the at least a portion of the audio input comprises parsing the audio input to determine a particular portion of the audio input associated with the command, and storing only the portion of the audio input associated with eh command. 
     The system may perform an action requested by the user (Operation  208 ). That is, the system may execute an action according to a command portion of the audio input. In some embodiments, the system may perform the action substantially contemporaneously with receiving the audio input. For example, responsive to receiving audio input that includes the command “Add milk to my grocery list,” the system may add the item “milk” to a grocery list. In some embodiments, the system may perform the action at a time subsequent to receiving the audio input. For example, the system may receive audio input that includes the command “Remind me to call John next Thursday at noon.” The system may refrain from executing the action (e.g., providing the reminder until the time specified in the command (e.g., Thursday at noon). At the specified time, the system performs the action of reminding the user to call John. For example, the system may present a graphical and/or audio reminder to the user. 
     In some embodiments, performing the action includes indicating that one or more of audio input or context information associated with the action are stored. For example, the system may display an icon indicating that context information and/or audio input data associated with the action is stored. 
     Responsive to performing the action, the system may receive a request to present the stored context information and/or audio input data (Operation  210 ). In embodiments, the request may include clicking or otherwise actuating a displayed icon. Alternatively or additionally, the request may include a subsequent audio request to present the stored information. As an example, subsequent to the system performing the action, the user may issue the voice command “Replay my original audio.” 
     In some embodiments, when a system receives the request to present the stored context information and/or audio input data, the system may mark at least the stored portion of the audio input for use in training data for the system. That is, the system may determine that the, based on the request, there is an error in the transcription. The audio input may be used in training to help increase accuracy of future transcriptions. 
     Responsive to the request to present the stored context information and/or audio input data, the system may retrieve the stored context information and/or audio input data (Operation  212 ). The system may determine a most recent previous action and an identifier associated with the action. The system may determine, based on stored mapping information, context information and/or audio input data associated with the action. Based on this association, the system may retrieve the context information and/or audio input data by known means, such as by reading the context information and/or audio input data from a data repository. 
     The system may present the retrieved context information and/or audio input data (Operation  214 ). Presenting the context information and/or audio input data includes playing at least a portion of the retrieved audio data. In some embodiments, the system may play the entirety of the retrieved audio data. Alternatively, the system may play a portion of the retrieved audio data corresponding to the command. Additionally or alternatively, presenting the context information and/or audio input data includes presenting retrieved context information. The retrieved context information may be presented graphically on a display, played audibly (e.g., using a text to speech algorithm), and/or provided via a message (e.g., an email, text message, log file, or other message). 
     4. Example Embodiment 
     A detailed example is described below for purposes of clarity. Components and/or operations described below should be understood as one specific example which may not be applicable to certain embodiments. Accordingly, components and/or operations described below should not be construed as limiting the scope of any of the claims. 
       FIG. 3  illustrates an example device  300  using a virtual assistant platform. The user has previously provided audio input including a command “Remind me to call John next Thursday at noon.” 
     The virtual assistant platform  304  performs speech to text analysis on the audio input. A transcription error in the speech to text process causes the virtual assistant platform to transcribe the command received by the user as “Remind me to Paul Fawn next Thursday at noon.” Accordingly, the virtual assistant platform schedules a reminder for Thursday at noon, including the text “Paul Fawn.” The system also stores the audio input and context information associated with the device at the time the audio input was received. 
     At noon on Thursday, the virtual assistant platform  304  causes the device  300  to present the scheduled reminder  306  on a display  302 . The reminder  306  includes the mis-transcribed text “Paul Fawn.” The reminder  306  includes an icon  308  indicating that the virtual assistant platform stored the audio input that resulted in the platform scheduling the reminder. The reminder  306  includes an icon  310  indicating that the virtual assistant platform stored context information associated with the device at the time the audio input was received. 
     The user may request that the audio input that resulted in the platform scheduling the reminder be replayed by clicking or otherwise actuating the icon  308  and/or by issuing a voice command such as “Replay original audio.” Responsive to such a command, the virtual assistant  304  may retrieve and play the stored audio input. 
     The user may request that the context information associated with the device at the time the audio input was received be present by clicking or otherwise actuating the icon  310  and/or by issuing a voice command such as “Show context information.” Responsive to such a command, the virtual assistant  304  may retrieve and display the stored context information. 
     5. Miscellaneous; Extensions 
     Embodiments are directed to a system with one or more devices that include a hardware processor and that are configured to perform any of the operations described herein and/or recited in any of the claims below. 
     In an embodiment, a non-transitory computer readable storage medium comprises instructions which, when executed by one or more hardware processors, causes performance of any of the operations described herein and/or recited in any of the claims. 
     Any combination of the features and functionalities described herein may be used in accordance with one or more embodiments. In the foregoing specification, embodiments have been described with reference to numerous specific details that may vary from implementation to implementation. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense. The sole and exclusive indicator of the scope of the invention, and what is intended by the applicants to be the scope of the invention, is the literal and equivalent scope of the set of claims that issue from this application, in the specific form in which such claims issue, including any subsequent correction. 
     6. Hardware Overview 
     According to one embodiment, the techniques described herein are implemented by one or more special-purpose computing devices. The special-purpose computing devices may be hard-wired to perform the techniques, or may include digital electronic devices such as one or more application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or network processing units (NPUs) that are persistently programmed to perform the techniques, or may include one or more general purpose hardware processors programmed to perform the techniques pursuant to program instructions in firmware, memory, other storage, or a combination. Such special-purpose computing devices may also combine custom hard-wired logic, ASICs, FPGAs, or NPUs with custom programming to accomplish the techniques. The special-purpose computing devices may be desktop computer systems, portable computer systems, handheld devices, networking devices or any other device that incorporates hard-wired and/or program logic to implement the techniques. 
     For example,  FIG. 4  is a block diagram that illustrates a computer system  400  upon which an embodiment of the invention may be implemented. Computer system  400  includes a bus  402  or other communication mechanism for communicating information, and a hardware processor  404  coupled with bus  402  for processing information. Hardware processor  404  may be, for example, a general-purpose microprocessor. 
     Computer system  400  also includes a main memory  406 , such as a random-access memory (RAM) or other dynamic storage device, coupled to bus  402  for storing information and instructions to be executed by processor  404 . Main memory  406  also may be used for storing temporary variables or other intermediate information during execution of instructions to be executed by processor  404 . Such instructions, when stored in non-transitory storage media accessible to processor  404 , render computer system  400  into a special-purpose machine that is customized to perform the operations specified in the instructions. 
     Computer system  400  further includes a read only memory (ROM)  408  or other static storage device coupled to bus  402  for storing static information and instructions for processor  404 . A storage device  410 , such as a magnetic disk or optical disk, is provided and coupled to bus  402  for storing information and instructions. 
     Computer system  400  may be coupled via bus  402  to a display  412 , such as a cathode ray tube (CRT), for displaying information to a computer user. An input device  414 , including alphanumeric and other keys, is coupled to bus  402  for communicating information and command selections to processor  404 . Another type of user input device is cursor control  416 , such as a mouse, a trackball, or cursor direction keys for communicating direction information and command selections to processor  404  and for controlling cursor movement on display  412 . This input device typically has two degrees of freedom in two axes, a first axis (e.g., x) and a second axis (e.g., y), that allows the device to specify positions in a plane. 
     Computer system  400  may implement the techniques described herein using customized hard-wired logic, one or more ASICs or FPGAs, firmware and/or program logic which in combination with the computer system causes or programs computer system  400  to be a special-purpose machine. According to one embodiment, the techniques herein are performed by computer system  400  in response to processor  404  executing one or more sequences of one or more instructions contained in main memory  406 . Such instructions may be read into main memory  406  from another storage medium, such as storage device  410 . Execution of the sequences of instructions contained in main memory  406  causes processor  404  to perform the process steps described herein. In alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions. 
     The term “storage media” as used herein refers to any non-transitory media that store data and/or instructions that cause a machine to operate in a specific fashion. Such storage media may comprise non-volatile media and/or volatile media. Non-volatile media includes, for example, optical or magnetic disks, such as storage device  410 . Volatile media includes dynamic memory, such as main memory  406 . Common forms of storage media include, for example, a floppy disk, a flexible disk, hard disk, solid state drive, magnetic tape, or any other magnetic data storage medium, a CD-ROM, any other optical data storage medium, any physical medium with patterns of holes, a RAM, a PROM, and EPROM, a FLASH-EPROM, NVRAM, any other memory chip or cartridge, content-addressable memory (CAM), and ternary content-addressable memory (TCAM). 
     Storage media is distinct from but may be used in conjunction with transmission media. Transmission media participates in transferring information between storage media. For example, transmission media includes coaxial cables, copper wire and fiber optics, including the wires that comprise bus  402 . Transmission media can also take the form of acoustic or light waves, such as those generated during radio-wave and infra-red data communications. 
     Various forms of media may be involved in carrying one or more sequences of one or more instructions to processor  404  for execution. For example, the instructions may initially be carried on a magnetic disk or solid-state drive of a remote computer. The remote computer can load the instructions into its dynamic memory and send the instructions over a telephone line using a modem. A modem local to computer system  400  can receive the data on the telephone line and use an infra-red transmitter to convert the data to an infra-red signal. An infra-red detector can receive the data carried in the infra-red signal and appropriate circuitry can place the data on bus  402 . Bus  402  carries the data to main memory  406 , from which processor  404  retrieves and executes the instructions. The instructions received by main memory  406  may optionally be stored on storage device  410  either before or after execution by processor  404 . 
     Computer system  400  also includes a communication interface  418  coupled to bus  402 . Communication interface  418  provides a two-way data communication coupling to a network link  420  that is connected to a local network  422 . For example, communication interface  418  may be an integrated services digital network (ISDN) card, cable modem, satellite modem, or a modem to provide a data communication connection to a corresponding type of telephone line. As another example, communication interface  418  may be a local area network (LAN) card to provide a data communication connection to a compatible LAN. Wireless links may also be implemented. In any such implementation, communication interface  418  sends and receives electrical, electromagnetic, or optical signals that carry digital data streams representing various types of information. 
     Network link  420  typically provides data communication through one or more networks to other data devices. For example, network link  420  may provide a connection through local network  422  to a host computer  424  or to data equipment operated by an Internet Service Provider (ISP)  426 . ISP  426  in turn provides data communication services through the world wide packet data communication network now commonly referred to as the “Internet”  428 . Local network  422  and Internet  428  both use electrical, electromagnetic, or optical signals that carry digital data streams. The signals through the various networks and the signals on network link  420  and through communication interface  418 , which carry the digital data to and from computer system  400 , are example forms of transmission media. 
     Computer system  400  can send messages and receive data, including program code, through the network(s), network link  420  and communication interface  418 . In the Internet example, a server  430  might transmit a requested code for an application program through Internet  428 , ISP  426 , local network  422  and communication interface  418 . 
     The received code may be executed by processor  404  as it is received, and/or stored in storage device  410 , or other non-volatile storage for later execution. 
     In the foregoing specification, embodiments of the invention have been described with reference to numerous specific details that may vary from implementation to implementation. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense. The sole and exclusive indicator of the scope of the invention, and what is intended by the applicants to be the scope of the invention, is the literal and equivalent scope of the set of claims that issue from this application, in the specific form in which such claims issue, including any subsequent correction.