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: Where will you be departing from? Sentence2: If I could leave on the first one after 16:30. that would be perfect. Sentence3: No problem, enjoy your stay in cambridge. Sentence4: I am looking for a place to stay in Cambridge. I prefer a cheap, 4 star hotel. Sentence5: The first one after 16:30 is the TR6477, leaving at 16:40. Would you like a ticket on this train? Sentence6: What day would you like to travel? Sentence7: Yes, I would like to book it for 5 people for 5 nights, beginning on Friday. Sentence8: Good news! Booking was successful, the total fee is 375.5 GBP payable at the station . Reference number is : K5EOIMR6 . Is there anything else? Sentence9: Does this place have free wifi? Sentence10: Sure. I would like 5 tickets, please. Sentence11: Yes, the cambridge belfry has internet. Would you like me to book it for you? Sentence12: On Friday, please. Sentence13: That will be all. Thank you! Sentence14: Yes, can you help me find a train into Cambridge? Sentence15: I have he cambridge belfry in the west area. It is cheap and has 4 stars. Would you like me to book that for you? Sentence16: We have several trains to cambridge the earliest leaves at 05:40 and the latest one leaves at 23:40. Do you have a specific time you would like to leave? Sentence17: You are booked and your reference number is CK82ZWXD . Can I help with anything else? Sentence18: I am departing from Birmingham New Street Question: Who has spoken the sentence 6? (A) User (B) System
A:
Answer: (A) User