Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Yes, I need to book that for 8 people. Please send the reference number. Sentence2: The entrance fee is free for the museum is free, and the theater fee is unknown. Sentence3: I'd like to go from stansted airport to Cambridge. Sentence4: Booking was successful, the total fee is 80.8 GBP payable at the station . Reference number is : VHL6TYDF . Sentence5: Okay, thanks for that information. I would like to book a train as well. I'm leaving Tuesday after 16:00 from Cambridge. Sentence6: You're welcome goodbye. Sentence7: I am looking for places to go in town centre. What are some options? Sentence8: What are the entrance fees for all those locations? Sentence9: I have the Mumford Theatre at anglia ruskin enterprise, east road, or the fitzwilliam museum at trumpington street. Sentence10: TR8372 leaves at 16:24. Are you interested? Sentence11: Thank you! Goodbye. Sentence12: Alright, where would you like to go? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System