You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: OK, thanks, that's all I need. Sentence2: TR4216 arrives in Stevenage at 18:10. Total travel time is 49 minutes, and the per person fare is 10.24 GBP. Sentence3: The first train out of Cambridge to Stevenage after 16:30 is the TR4216, which leaves at 17:21. Sentence4: I am looking to go from cambridge to stevenage on saturday leaving after 16:30 Sentence5: Club Salsa is a nice one, phone is 07782218745. Anything else you need? Sentence6: Okay great. Glad I could be of assistance. Sentence7: Certainly. Just to confirm, is Cambridge your destination or are you looking for another destination? Sentence8: Have a good day. Bye. Sentence9: I also need a train leaving Stevenage on Saturday, please. Sentence10: Thank you for choosing Help Desk. Sentence11: There are 5 good nightclubs in the centre and one in the south. Which area do you prefer? Sentence12: Hi, do you know of a good night club? Sentence13: It doesn't matter. Can I have the phone numbers? Sentence14: Can you tell me the time it arrives, and the price? Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System