You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: how about 15:00 instead? Sentence2: I'd like to find an expensive place to dine that specifically serves italian food. Sentence3: Yes, I will need the reference number. Sentence4: No that was everything I needed. Thank you for your help! Sentence5: Yes, please. There are 4 of us for this Friday at 16:00. Sentence6: Okay. Would you like to go to the centre or south part of town? Sentence7: Booking was unsuccessful. Perhaps another day or time? Sentence8: Okay, that worked, and I've successfully booked your table. I can give you the reference number, if you'd like. Sentence9: Frankie and Bennys meets you criteria, would you like me to make a reservation for you? Sentence10: I would like the south part of town please. Sentence11: Your Reference number is : VRU8VSG0 . Do you need any further assistance? Sentence12: You're very welcome. Have a good meal! Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User