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 just need to leave after 18:45. Sentence2: I would like to book a train for Tuesday at 18:45 departing at bishops stortford and arrive at Cambridge. Sentence3: What time would you like to arrive by? Sentence4: No, thank you for your help. Sentence5: Hi..A reservation for 4 people has been confirmed. The reference number is 30MCMOEX and the price is 40.4GBP payable at the station. Anything else I can do? Sentence6: The TR9286 train goes from bishops stortford to cambridge on Tuesday at 19:29, Shall I book that for one person? Sentence7: Can you please book it for 4 people? Sentence8: you are welcome! Have a good day! Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User