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 several trains on that route that run throughout the day. Do you know what day and time you'd like to travel? Sentence2: Well then, thank you for using our service. Have a great day. Goodbye. Sentence3: I am looking for a train that ARRIVES at 11:15 and would like to book it for 5. I also need the reference number. Sentence4: I need to leave Sunday and arrive by 11:15. Sentence5: Hi, I am looking for a train that goes to bishops stortford and departs from cambridge. Sentence6: Sure, it is a college located in the centre area right on trumpington street. Would you like the phone number? Sentence7: What is the entrance fee and address of pembroke college? Sentence8: I've booked you on the TR9904. The price is 40.40 GBP that is payable at the station. Your reference number is 3MF59CSO . Is there anything else? Sentence9: Thank you very much, that will be all. Sentence10: I am also looking for particular place called Pembroke College. Do you have any information about this place? Sentence11: There is no entrance fee for Pembroke College. The address is Trumpington Street. Sentence12: There is no train leaving at 11:15, do you want to change to a different time. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User