Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I am going to London Liverpool Street and need to leave Cambridge after 14:45. Sentence2: Could you please provide me with your destination site and your departure time and arrival? Sentence3: Could you also provide me with a concerthall in the south? Sentence4: What about a nightclub? Sentence5: 'The Place' is a nightclub in the south, located at 22 Sidney Street. The phone number is 01223324600. Would you like to book the 15:59 train? Sentence6: Yes, the arrival time is 17:27. Sentence7: Please book me a train from Cambridge on Monday Sentence8: Unfortunately there aren't any concerthalls in the south. Is there anything else you would like? Sentence9: Can you give me the arrival time of the 15:59? Sentence10: There are 5 trains available leaving at 15:59, 17:59, 19:59, 21:59, and 23:59. They all take 88 minutes and cost 16.60 pounds. Question: Who has spoken the sentence 8? (A) User (B) System
A:
Answer: (A) User