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: The TR7610 leaves Cambridge at 21:21 and arrives in Leicester at 23:06. Would you like to book a ticket? Sentence2: Booking was successful, the total fee is 90.72 GBP payable at the station. Your reference number is DKV6X3Z3 Sentence3: Yes, can you book me a ticket for 3 people? Sentence4: Sure thing! It is in the east, moderate priced and 4 star. Need me to book a room? Sentence5: Yes I have a listing for the a and b guest house. Sentence6: Can you tell me the phone number, hotel type, and postcode? I need to check on a few things. Sentence7: I need a train leaving Cambridge after 21:15. Sentence8: The phone number for A and B Guest House is 01223315702 and the postcode is cb12dp. Sentence9: Wonderful. Can you tell me if A and B Guesthouse is still around? Sentence10: Can get some detailed information on this place? Sentence11: Ok, I have 5 options for you. The earliest leaves at 21:59. Sentence12: I would like to travel on Saturday and go to Leicester. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User