You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Yes, they are located in the centre on wollaston road, postal is cb12ew and phone is 01223334898. Is there anything else that I can assist with? Sentence2: Okay, what is your destination and arrival preference? Sentence3: Yes please book that train, for 7 people. And may I get a reference number for the booking? Thanks. Sentence4: Hughes Hall is located in the centre. There are a lot of restaurants in that part of town. Are you interested in a particular type? Sentence5: The address for Hughes Hall is Wollaston Road. The phone number is 01223334898. Sentence6: No thank you. Have a great day. Goodbye Sentence7: I need to go to cambridge from kings lynn. Sentence8: I have train TR6368 leaving at 6:11 and arriving at 6:58. Would you like to book that? Sentence9: Thanks. I also need a train for Sunday. Sentence10: Can I have the address and phone number? I also need a train leaving Sunday and arriving by 21:00 Sentence11: I am glad to help have a nice stay Sentence12: What part of town is it located in? Are there any restaurants in that area? Sentence13: sure thing your ref # is 7RBUS3T6, anything else today? Sentence14: Can you help me find a place called Hughes Hall? Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System