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, glad I could help. Sentence2: I personally like Parkside Pools. It's in the center of town, on Gonville Place. Sentence3: Any area is fine. Which of the 4 swimming pools do you suggest? Sentence4: It is cb11ly. Is there anything else I can help you with? Sentence5: Where will you be departing from? Sentence6: Thanks. That was all I needed. Goodbye. Sentence7: I am departing from Cambridge. Sentence8: I am looking for information on places to go in Cambridge. Can you help with that? Sentence9: My destination is london kings cross Sentence10: Can I get the postcode as well? Sentence11: I can help with that. Is there a particular area you're interested in? Sentence12: Yes, there are 4 swimming pools that match those requirements. Is there a particular area you would like to go to? Sentence13: There are 278 trains that meet that criteria. Would you like to narrow down your options by departure site, destination, or arrival time? Sentence14: I have made that reservation and your reference number is 1702SDBO . Sentence15: TR1502 arrives in london kings cross friday at 11:51. Would you like me to book you any seats? Sentence16: I also need a train leaving after 11:00 on friday Sentence17: What I'd really like is to find a swimmingpool. Sentence18: Yes book for 8 people and I need a reference number Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Can you recommend a moderately priced restaurant in the South part of town? Sentence2: could i have the address and phone number please? Sentence3: sure, pizza hut cherry hinton is located at G4 cambridge leisure park clifton way cherry hinton and the phone number is 01223 413000. Is there anything else I can help you with? Sentence4: Would you prefer Italian or Modern european food? Sentence5: I don't care. Either one is fine. Sentence6: No, that is all I needed. Thank you. Bye bye. Sentence7: How about Pizza Hut Cherry Hinton. It serves Italian food, is in the moderate price range, and in the south part of town. Sentence8: Goodbye. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I have train TR3225 that arrives at 10:58 is that good for you? Sentence2: You are all set, your confirmation number is 1Q0G4OWL, can I assist with anything else? Sentence3: Trains begin leaving Kings Lynn at 5:11, may I know your destination please? Sentence4: I need help finding a train out of kings lynn. Sentence5: Thank you! Can you also please recommend a 4-star guesthouse? Sentence6: Is the system back up? Can you make that booking I asked for.? Sentence7: Would day do you want to travel on ? Sentence8: I want to travel on Friday. Sentence9: Sure that sounds great. I need it for 8 people and 5 nights starting on friday. Sentence10: I apologize the system is down please try back later Sentence11: You are booked for train ID TR1958. Your reference number is H8N2SC1Z . The total fee is 78.4 GBP payable at the station. May I help with something else? Sentence12: My destination is Cambridge and I need to be there by 11:30. Sentence13: Yes, I need to book that for 8 people. Can I have the reference number? Sentence14: a and b guesthouse is a nice place, do you want their info ? Sentence15: No that would be it thanks ! Sentence16: You're welcome, I'm glad to have helped! Bye now! Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System