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

Example Input: Sentence1: How about Caffe Uno, they are in the centre area. Their address is 32 Bridge Street City Centre and their phone number is 01223 448620. Sentence2: Perfect, thank you! Sentence3: I'm sorry, but I cannot find any expensive Lebanese restaurants. Sentence4: Thank you. Good bye Sentence5: Hello, I am looking for an expensive restaurant that serves Lebanese food. Sentence6: Can I get the address, phone number, and area of an Italian restaurant? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, book me for Sunday departing from london kings cross. Sentence2: Your booking is successful. Train is leaving at 07:17 and it costs 151.04 GBP. Your reference number is 5Y7XKAJY . Anything else I can help with? Sentence3: I need a not later than 9:15 train to Cambridge. Sentence4: 8, please Sentence5: How many tickets will you require? Sentence6: It looks like there's a train for Cambridge with an arrival time of 07:07. Would you like me to book that for you? Sentence7: Okay thank you for calling. Don't hesitate to call us again. Sentence8: No thank you that's I need! Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: That's correct, the number I gave you was the reference number you'll need. You'll need to pay 420.56 GBP when you get to the station. Is there anything else? Sentence2: Can you help me find a train? I am looking for that departs from Cambridge on Saturday. Sentence3: I would like to go to Birmingham New Street and the train should leave after 14:15. Sentence4: That would be great. Can you get me 7 tickets on that train? Sentence5: Is there anything I can help you with today? Sentence6: There are 202 trains leaving from Cambridge on Saturday. Can you give me a destination point so that I can narrow it down for you? Sentence7: Thank you. You have a night day as well. Sentence8: Ok. Is that also the reference number? Thanks. Sentence9: The TR3735 leaves at 15:01, will that suit you? Sentence10: Alright, you booking was successful, your confirmation number is KU1R7NQO . Sentence11: No, that would be all. Thanks. Have a night day. Sentence12: Okay. Thank you very much. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System