You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Great, you're booked with reference number EZAWT5OG . May I help with anything else? Sentence2: Sounds great, but I actually would prefer to maybe visit a college campus. Can you recommend one? Sentence3: The postcode is cb58bl. Is there anything else I can assist you with? Sentence4: Yes, I can. How about Scudamore's Punting Co.? It is located in the centre of town so it would be close to your restaurant. Sentence5: I sure would, thanks. Sentence6: The Varsity Restaurant serves international food at moderate prices. They are located in the centre. Would you like help in making a reservation? Sentence7: I am traveling to Cambridge and am super excited to see some of the local tourist attractions and I am looking for a restaurant call The Varsity Restaurant. Sentence8: Yes, I need a taxi to take me from the college to the restaurant. I want to make sure it arrives by my reserved time. Sentence9: Booking completed! Booked car type : red audi Contact number : 07727861490 is there anything else i can help you with? Sentence10: I am sorry but I was unable to book you at that time. Would you like to try a different time? Sentence11: Could we make it for 14:00. Sentence12: I'm also looking for places to go in town. Can you assist me with that also? Sentence13: Yes that time is available, would you like me to book that for you? Sentence14: I have five places. Jesus college is a good one, what would you like to know? Sentence15: Yes please. Can you make it for 7 people on sunday at 15:00? Sentence16: Can I get the postcode? Question: Who has spoken the sentence 6? (A) User (B) System
A:
Answer: (A) User