Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: No, I think that's all that I'm looking for. Thank you very much for the help. Sentence2: no, just the postcode Sentence3: That should be fine, can you book that on thursday to cambridge? Sentence4: Sure, the postcode of the Scott Polar Museum is cb21er. Is there anything else I can help you with today? Sentence5: hi am looking for a train leaving broxbourne at 11:00. Sentence6: There are no trains leaving at exactly 11:00. Is a train leaving Friday at 11:32 okay? Sentence7: You're welcome. Enjoy your time! Sentence8: One ticket, please. Sentence9: Thank you so much for the assistance! Sentence10: Excellent. I hope you have a great time! Sentence11: The price of the ticket is 17.90 pounds, shall I book it for you now? Sentence12: Okay you're all set for your train ticket. Also the Scott Polar Museum is free! Would you like their address or phone number? Sentence13: Yes, I can. How many tickets do you require? Sentence14: Yes, please. I'm also looking a ticket to the Scott Polar Museum Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User