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: I have made a reservation at Charlie Chan for 2 people on Monday at 17:15. The reservation reference is 9ygetj1 . The table will be held for 15 minutes. Sentence2: Thanks, that's all I need. Have a nice day. Sentence3: Sure, adc theatre's postcode is cb58as and the address is park street. Sentence4: Any area is fine, can you give me the address and postcode of the closest theater to centre? Sentence5: There are several theatres located in the city centre. Is that the correct area? Sentence6: Okay, I have three options that meet your needs. Charlie Chan, Rice House, and Golden House. Would you like me to make a reservation for one of those? Sentence7: Great! Do you have a good chinese restaurant in centre that I could go to. Sentence8: Make a reservation for Charlie Chan. Book a table for 2 people at 17:15 for Monday. Sentence9: Thank you! Sentence10: I have 10 chinese restaurants ranging from cheap to expensive. Is there any limits on what you would like? Sentence11: Yes, I am looking for a theatre in the town. Sentence12: I'd like a cheap Chinese restaurant, please. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System