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 that in the Centre? If so, could I get the postcode, and how much the entrance fee is? Sentence2: I booked the train. Your reference is 8FYR7N4L and it was 78.4 total. Sentence3: What day and what time? Sentence4: Great, that's all I needed! Sentence5: I need a train from kings lynn, please. Sentence6: Little saint mary's church has some great architecture you could check out Sentence7: Wonderful! Have a great day! Sentence8: I found 10 trains that match. How about TR2788 that leaves at 05:11? Sentence9: I would like to leave on Thursday and arrive by 15:15. Sentence10: Sure thing! their postcode is cb58bs and there is no entrance fees to get in Sentence11: that sounds fine. book for 8 people and get me the reference number Sentence12: Great! Can you also recommend something interesting to do while I am in town? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User