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: Yes, there are 6 options. Does the part of town matter? Sentence2: May I have the phone number? Sentence3: You're welcome. Good bye. Sentence4: there is no expensive restaurant that serves russian food can I help you with anything else Sentence5: I could recommend Graffiti in the west.Would you like more information? Sentence6: I am looking for an expensive restaurant that serves russian food. Sentence7: Thank you goodbye. Sentence8: Yes do you have british type food? Sentence9: I don't care. Sentence10: Their phone number is 01223 277977. Is there anything else I can help you with? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User