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: do you know the lensfield hotel? I need their phone # and how many stars do they currently have? Sentence2: Certainly, where is your place of departure and arrival? Sentence3: I need a train on Tuesday that arrives by 16:45. Sentence4: The lensfield is a 3 star hotel and the phone number is 01223355017. Would you like to make reservations there? Sentence5: No thank you. That's all I need for now. Sentence6: I have train TR1395 that leaves at 13:39 and will arrive in Cambridge by 15:07. Would that work for you? I would be happy to book your ticket. Sentence7: Your train booking was successful. You can pay the fee of 33.2 at the station. Your reference number is 14AXWO0V . Sentence8: Ok. Enjoy your stay. Sentence9: For two people please. I will need the reference number. I also want to stay at the Lensfield hotel. Sentence10: I want to depart from London and arrive in Cambridge. Sentence11: london liverpool street. Sentence12: london kings cross or london liverpool street? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User