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: TR5499 leaves Stansted Airport at 14:24 and arrives in Cambridge at 14:52. Would that work for you? Sentence2: There are 33 restaurants that fit your requirements, is there a type of cuisine you are interested in? Sentence3: I need to arrive by 15:15, can you give me a train ID matching that and a departure time? Sentence4: The restaurant should serve seafood. Sentence5: i have found 19 trains. what time do you wish to depart? Sentence6: What time would you like me to book the reservation? Sentence7: That is everything I needed to know. Thanks for your help! Sentence8: Loch Fyne is an expensive seafood restaurant in the centre. Should I book it? Sentence9: Please book the reservation for 18:30. Sentence10: Thanks. Now I need to find a train from stansted airport to cambridge on wednesday. Sentence11: The booking was successful. The reference number is JX5WC64A . Sentence12: I am looking for an expensive restaurant in the centre at Cambridge. Sentence13: Okay I am glad to be of service. Thanks for calling. Sentence14: Yes please. Can you book it for 3 people on Wednesday? Question: Who has spoken the sentence 6? (A) User (B) System
A:
Answer: (A) User