Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: No, that is all. Thank you so much for your help. Sentence2: Great yeah that sounds great can you book a table for 5 people at 11:30 on Sunday? Sentence3: How about 10:30 on sunday? And may I have a reference number? Sentence4: Unfortunately there are no tables available, please try another day or time slot. Sentence5: There is an expensive Italian restaurant named Frankie and Bennys at Cambridge Leisure Park Clifton Way Cherry Hinton. Would you like to go there or choose another? Sentence6: You're welcome. Good-bye. Sentence7: I was able to book a table for 5 at 10:30 on Sunday. Your reference number is MBC9E6AL . Is there anything else I can help you with today? Sentence8: I am looking for an expensive Italian restaurant. Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User