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: Yes, the Autumn House is a cheap, 4 star guesthouse. Free wifi and parking are included. Would you like me to make a booking for you? Sentence2: The train should leave Monday after 17:45. Sentence3: I would like one that it relatively cheap and located in the east part of town. Sentence4: No problem. Enjoy your time in Cambridge! Sentence5: nope that is all thanks Sentence6: Yes, go ahead and book 4 tickets for me on that train! Once that is done, can I have the reference number? Sentence7: The postcode for the autumn house is cb58rs. There are 133 trains travelling from Cambridge to kings lynn. Could you be more specific on what day/time you're looking for? Sentence8: Booking was successful, the total fee is 39.2 GBP payable at the station. Reference number is : Y9FTRIGK . Is there anything else I can help with? Sentence9: Yes, can I get the postcode, and also I am looking for a train that departs from Cambridge and arrives at Kings Lynn as well. Sentence10: I am looking for a cheap place to stay in the east part of town. Sentence11: Well, there's the Autumn House, would you like to give that a try? Sentence12: No problem. We have 3 guesthouses that match that. Do you have a further preference? Sentence13: Is that a 4-star place? I would like a 4-star place, even though I need it to be cheap. Sentence14: Trains run every hour from 18:11 all the way to 23:11. If you don't have a preference, perhaps I can book you the 18:11 train? It arrives at 18:58. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User