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: There are 70 results. Is there a certain day or time you'd like to leave? Sentence2: May I have the postcode as well ? Sentence3: Find me a train out of Cambridge to london kings cross Sentence4: i also need a place to dine. Sentence5: Yes I have booked that for you and your reference number is E3M7QM9F . Sentence6: You're welcome. Have a nice day! Sentence7: TR1006 arrives at 19:51, would that work? Sentence8: Here you go cb30ad Sentence9: Yes, British food in the West would be great! Sentence10: Great, thanks very much, that's all I need! Sentence11: Saint johns chop house serves british food in the west. Sentence12: I need it on Friday and it should arrive at London Kings Cross by 21:45. Sentence13: I guess that will work. Can you please make a booking for 3 people and when you are through may i also have the booking reference number. Sentence14: 01223353110 is the number. Sentence15: Is there a particular cuisine or location that I can recommend for you? Sentence16: What is the phone number and postcode to Saint Johns Chop House? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System