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 please book it for 6 people for 4 nights starting wednesday. Sentence2: OK, the booking was successful. The total fee is 60.59 GBP, payable at the station. Your reference number is AK36XDFI . Sentence3: Thank you so much. You have been very helpful. That is all I need for now. Bye. Sentence4: Yes I have stayed there many times. It is pretty cheap but offers free internet and free parking. Can I book a room for you? Sentence5: Okay, you're all set! Your reference number is: 75UHIUU5 . Sentence6: I have the TR7667 that leaves at 08:24 available. Would you like me to book seats on that? Sentence7: I will be departing stansted airport and arriving in cambridge. Sentence8: I am also looking for a train leaving after 08:15 and should be on the same day as the hotel booking. Sentence9: Yes, please book it for 6 people. Sentence10: You're welcome. Have a nice day. Sentence11: Have you ever heard of alexander bed and breakfast? Sentence12: Can you tell me where you will be departing from and where you are heading to? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System