You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I was able to book you, your reference number is CEP20AFO ., total cost 57.28 payable at the station.. Any other questions? Sentence2: It is a college in the centre of town located at saint andrew's street, poscode cb23ap and their phone number is 01223334200. Sentence3: That's perfect. Please book it for 4 tickets. Sentence4: Good night, enjoy the rest of your evening. Sentence5: I need it to depart from Broxbourne and arrive in Cambridge. Sentence6: Train TR0279 arrives at 14:32 which is the closest one. Sentence7: Yes please. I've heard that Emmanuel College is an interesting place. What can you tell me about it? Sentence8: Where would you like to depart from and where do you want to arrive at? Sentence9: The TR7846 leaves at 09:32 and arrives at 10:32. Would that work? Sentence10: Great! I appreciate all the info. Goodbye! Sentence11: I'm looking for a train that arrives by 15:15 on saturday. Sentence12: Can I get one closer to my arrival time? Question: Who has spoken the sentence 6? (A) User (B) System
A:
Answer: (A) User