You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: You're welcome. Can I help you with anything else? Sentence2: That is all. Thanks Sentence3: The post code is CB11JG. Sentence4: Thank you, what's the post code? Sentence5: Thank you for your help Sentence6: Cambridge, parkside police telephone number 01223358966. Sentence7: I need to get to the nearest police station, can you assist me? Sentence8: Okay. Have a good day and thanks for using our system. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I would prefer one of the expensive places. Need to impress my guests, you know? Sentence2: I see one moderately priced Indian restaurant in that area, and several expensive ones. Do you have a preference? Sentence3: Actually, I would like to book the hotel for 6 people for 4 nights starting on Sunday. Sentence4: I want an expensive place to stay in the west side. Sentence5: Okay, the phone number is 01480446000 for your convenience. Is there anything else I can help you with? Sentence6: There are three expensive Indian Restaurants in that area. Can I recommend Tandoori Palace? Sentence7: Thank you, you have a good day! Sentence8: I don't really need internet, but that sounds like everything else I want. Yes, I'd like you to book it. Sentence9: Yes, is 3 nights possible? Could I also please have a reference number? Sentence10: I was not able to reserve a table for you at that time. Is there a different day or time slot that you would like? Sentence11: Booking was not possible. Would you like to try a shorter stay, fewer rooms, or another day? Sentence12: Great! I have a table for 6 people at 11:30 onSundar at Tandoori Palace, Reference Number 3BMGPAN3 . Is there anything else I can do for you? Sentence13: I will hold off on the booking today I think I have all I need Sentence14: No thank you, that is all I needed! Sentence15: Thank you. I would like to make reservations for my party to have dinner one night near the hotel. We would like to go to a restaurant that serves Indian food, if possible. Sentence16: Great, the booking was successful. Your reference number is HJHE475H . Is there anything else I can help you with? Sentence17: OK, what is your arrival date, number of nights, and number of people in your party? Sentence18: Yes, that sounds good. Please book it for the same 6 people at 12:30 on Sunday. Sentence19: The Huntingdon Marriott Hotel is an expensive, 4-star hotel in the west that offers free internet and parking. Would you like me to book this for you? Sentence20: Yes, how about 11:30 instead? Please send reference number for the booking. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: How many train tickets will you need? Sentence2: i'm leaving from peterborough on tuesday and the train should arrive after 15:30 Sentence3: I have a train that leaves at 15:48 and arrives at 16:38. Would that work for you? Sentence4: Just the one, please. Sentence5: Oh, yes, I meant I need to leave after 15:30. I guess that means it will arrive after 15:30, too, ha ha. Sentence6: Can we book the hotel for 1 person and 5 nights starting from Tuesday? Sentence7: The price is 16.50 pounds. Sentence8: You're welcome. Have a nice trip and stay. Goodbye. Sentence9: Please book that train. I'm also in search of a particular hotel. It's called Worth House. Sentence10: I was able to successfully book you at Worth House for 5 nights starting Tuesday. Your reference number is H38MB0WZ . Sentence11: You're very welcome. Have a great trip! Sentence12: Thank you so much that is everything that I need. Sentence13: OK, your train ticket is booked (Ref#WYJFK3C4). As far as the Worth House goes, it's a cheap, 4-star guesthouse on the north side of town. Sentence14: Yes, of course. Where would you like to leave from and when would you like to leave? Sentence15: Thank you! You've been very helpful. I will be sure to ask for you if I need anything else on our trip. Sentence16: Yes. What is the price on that? Sentence17: Just to confirm, did you want to leave after 15:30 or arrive by 15:30? Sentence18: I want to take a trip to Cambridge, but need some help locating a train. Can you provide some information for me please? Question: Who has spoken the sentence 12? (A) User (B) System
Example Output:
Answer: (A) User