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: Give me the arrival time and train ID of the earlier train. Also find me a cheap restaurant that serves north american food if available or Indian food. Sentence2: I booked you a table at kohinoor! Here is your reference number ZTGXVBXU . Anything else I can do for you? Sentence3: There's a train that arrives at 20:07. If you don't want to cut it that close, there's an earlier train that arrives at 18:07. Sentence4: I would like to arrive by 20:15. Sentence5: The arrival time of the TR5389 is 18:07. There are four restaurants that meet your criteria. Would you like a recommendation? Sentence6: Do you have something that leaves later but still makes the arrival time? Sentence7: The first train leaves at 5:50. Sentence8: Where and when are you departing from? Sentence9: Yes, any you choose will be fine. I'll need to book a table for the same day, at 15:30, and it will just be me. Sentence10: great, what is your preferred departure or arrival time? Sentence11: I'm going to Ely from Cambridge on Sunday. Thank you. Sentence12: I'm hoping to book a train. Sentence13: Great, that's all I need, thanks so much for your help! Have a great day! Sentence14: Have a good day as well. Bye. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System