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: Is there one you would recommend and the address please? Sentence2: Great, enjoy your trip! Sentence3: There are several museums in the center of town. Is there anything in particular you are interested in seeing? Sentence4: The Backstreet Bistro is in the town Centre. Do you want me to book you a table? Sentence5: I am looking for a restaurant that serves gastropub food and is expensively priced. Sentence6: Great, that's all I needed to know. Sentence7: No I will just go there. Can you help me find some museums in the centre of town? Sentence8: I have no preference, can you give me the postcode, phone number, and area for the closest one? Sentence9: The backstreet bistro phone number is 01223306306 and the post code is cb12qa. Sentence10: Thanks for using our system Sentence11: And what part of town is that in? Sentence12: I would recommend the Backstreet Bistro. Their address is 2 Sturton Street City Centre Sentence13: Thank you, goodbye again. Sentence14: I have 3 that match. One is in the east area and two are in the centre. Do you have a preference? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User