You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Are you looking for a certain type of attraction in cambridge? Sentence2: The TR0088 departs at 9:39 and arrives at 11:07 Sentence3: I'd like to book for 6 people. Sentence4: Alright! That's taken care of and your reference number is ZM4QYUPU . Is there anything else I can help you with? Sentence5: There are 23 musuems to choose from. Sentence6: I need a train going to Cambridge, departing from London Liverpool Street on Tuesday and would like to arrive by 12:45 Sentence7: Do you have a favorite? Pick one for me please. I need the postcode. Sentence8: Can you give me info on museums in town? Sentence9: Okay. Would you like to narrow it down by food type or price range? Sentence10: Very well, we are here if you changed your mind, have a great day. Sentence11: I am looking for information in Cambridge. Sentence12: I would also like information for a restaurant near the museum. Sentence13: I actually don't need anymore information, thank you. Sentence14: The museum of classical archaeology is in post code cb39da. Is there anything else that I can help you with?? Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System