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 want to go to a mutliple sports attraction. Sentence2: Do you like boats? There is the cambridge punter on 251a chesterton road. Sentence3: Sounds good to me! Can you give me their phone and address? Oh, and how much does it cost to get in? Sentence4: byard art would be nice Sentence5: The TR0798 leaves at 9:29 and gets you to Cambridge by 10:07. Would you like me to book you a ticket on it? Sentence6: You are booked on Thursday on TR0798, reference number is 06UZDAZR and the total cost is 80.8 GBP payable at the station. Sentence7: Thank you so much for your help, that's all I will need today! Sentence8: That would work. I need 8 tickets for that train please. Sentence9: Unfortunately, I don't have a multiple sport attraction in the centre. Can I try a different area or type of attraction for you? Sentence10: I am looking for a place to go in the Centre. Sentence11: How about a museum instead? Sentence12: Thank you for contacting Cambridge TownInfo centre! Have a pleasant trip! Goodbye! Sentence13: I am also looking for a train that arrives by 11:45 on Thursday from Bishops Stortford to Cambridge. Sentence14: Sure, the address is 14 King's Parade and their phone is 01223464646. Admittance is free. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System