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: The broughton house gallery is a museum located in the center of town. Sentence2: That sounds great. Can you give me the area and phone number for that museum? Sentence3: Okay, your ticket has been reserved. Your reference number is YOAVPYXH . Can I help you with anything else? Sentence4: I also need a train that is leaving on Thursday going to Cambridge. Sentence5: What museums can I visit in town? Sentence6: Sure, the phone number is 01223314960. It is located in the centre area. Sentence7: That will be all! Thank you! Sentence8: Yes as long as it arrives by 16:30 and I will be departing from Stevenage Sentence9: ok, yeah get me a ticket Sentence10: TR2833 departs Stevenage at 13:54 on Thursday and arrives in Cambridge at 14:43. I can book a ticket, if you like. Sentence11: You're welcome, have a great day. Sentence12: The TR2775 Leaves London Kings Cross Thursday at 5:17 and arrives in Cambridge 51 minutes later. Does that work? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System