A method for operating a virtual assistant, the method comprising: at an electronic device: initiating a virtual assistant session responsive to receiving user input for initiating the virtual assistant session; then, receiving a second user input; after receiving the second user input, determining a task based on the second user input; after determining the task based on the second user input, executing the task; after executing the task, presenting, at a first time and based on executing the task, a final result for the virtual assistant session; determining whether the user input for initiating the virtual assistant session is of a first type corresponding to a gesture input to the electronic device, a pressing of a physical button of the electronic device, or a pressing of a virtual button of the electronic device, or of a second type corresponding to an input received from an external electronic device, an audio input, or a motion input; in accordance with a determination that the user input for initiating the virtual assistant session is of the first type: determining, based on first data obtained using one or more sensors of the electronic device, whether one or more criteria representing expressed user disinterest are satisfied; and in accordance with determining that the one or more criteria representing expressed user disinterest are satisfied prior to a second time, automatically deactivating the virtual assistant session prior to the second time, wherein the second time is defined by a setting of the electronic device; and in accordance with a determination that the user input for initiating the virtual assistant session is of the second type: determining, based on second data obtained using the one or more sensors of the electronic device, whether one or more criteria representing expressed user engagement are satisfied; and in accordance with determining that the one or more criteria representing expressed user engagement are satisfied prior to a third time, forgoing deactivating the virtual assistant session at the third time, wherein the third time is a predetermined duration after the first time. initiating a virtual assistant session responsive to receiving user input for initiating the virtual assistant session; then, receiving a second user input; after receiving the second user input, determining a task based on the second user input; after determining the task based on the second user input, executing the task; after executing the task, presenting, at a first time and based on executing the task, a final result for the virtual assistant session; determining whether the user input for initiating the virtual assistant session is of a first type corresponding to a gesture input to the electronic device, a pressing of a physical button of the electronic device, or a pressing of a virtual button of the electronic device, or of a second type corresponding to an input received from an external electronic device, an audio input, or a motion input; in accordance with a determination that the user input for initiating the virtual assistant session is of the first type: determining, based on first data obtained using one or more sensors of the electronic device, whether one or more criteria representing expressed user disinterest are satisfied; and in accordance with determining that the one or more criteria representing expressed user disinterest are satisfied prior to a second time, automatically deactivating the virtual assistant session prior to the second time, wherein the second time is defined by a setting of the electronic device; and determining, based on first data obtained using one or more sensors of the electronic device, whether one or more criteria representing expressed user disinterest are satisfied; and in accordance with determining that the one or more criteria representing expressed user disinterest are satisfied prior to a second time, automatically deactivating the virtual assistant session prior to the second time, wherein the second time is defined by a setting of the electronic device; and in accordance with a determination that the user input for initiating the virtual assistant session is of the second type: determining, based on second data obtained using the one or more sensors of the electronic device, whether one or more criteria representing expressed user engagement are satisfied; and in accordance with determining that the one or more criteria representing expressed user engagement are satisfied prior to a third time, forgoing deactivating the virtual assistant session at the third time, wherein the third time is a predetermined duration after the first time. determining, based on second data obtained using the one or more sensors of the electronic device, whether one or more criteria representing expressed user engagement are satisfied; and in accordance with determining that the one or more criteria representing expressed user engagement are satisfied prior to a third time, forgoing deactivating the virtual assistant session at the third time, wherein the third time is a predetermined duration after the first time.