You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: preferably the north side of town or somewhere near a shopping center Sentence2: Great, I have found several guesthouses but unfortunately no hotels in the north side that are rated 4 stars. Would you be interested in something like that? Sentence3: welcome again some other time Sentence4: I am looking for a place to stay. The hotel doesn't need to have free parking and should have a star of 4 Sentence5: Sure! The address is regent street and the postcode is cb21ad. Sentence6: What area of town would you like? Sentence7: I would prefer a hotel, is there one that has free wifi? Sentence8: The University arms hotel sounds like something you'd like! Sentence9: Thanks, that's all. Good bye. Sentence10: That sounds great. Can you give me their address and postcode? Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System