Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I would like to arrive at 16:15 please. Sentence2: On what day and time do you need to go there? Sentence3: The earliest I can have you there is 06:32. The latest is 10:32, with several options in between. Any preference? Sentence4: I would like to book for 7 people please. Sentence5: Yes I can, I need the day and time you'd like to go please. Sentence6: There are no expensive restaurants in the centre of town serving canapes Sentence7: I will be traveling on Thursday. Sentence8: Sorry it looks like TR2145 is no longer available, I will substitute with TR5687 which arrives same time. Booking complete 125.29 GBP payable at the station, Reference number 8XYHVB3U .Anything else? Sentence9: There are 33 expensive restaurants to choose from in the centre. To narrow down results, what type of food are you wanting to eat? Sentence10: I'm trying to figure out my eating options. Are there any expensive restaurants in the centre? Sentence11: Can you book a table for 7 people? Sentence12: I would be happy to book a train for you. Which day will you be travelling? Sentence13: thank you that is all good bye Sentence14: How about Thursday at 19:15? Sentence15: Aww, that's too bad. Do you have any that serve korean food? Sentence16: I now need a train Sentence17: No thank you that is all I need Sentence18: The train should depart from broxbourne and should go to cambridge. Sentence19: Yes, I would like to arrive by 10:32 is 16:15 is not available. Sentence20: How about a place that serves canapes? Sentence21: Train TR2145 will arrive at Cambridge by 10:32. How many tickets should I book for you? Sentence22: Yes, little seoul is a great place for korean food. Sentence23: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 718ZBFFA . Can I help you with anything else? Sentence24: I need to get a little information from you to book a train. Where are you traveling to and from and for what day and time do you need to travel? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User