Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Nandos is cheap restaurant in the south part of town serving Portuguese food. Would you like their phone number? Sentence2: The phone number for Nandos is 01223 327908. Is there anything else I can help you with? Sentence3: Yes, also I will need their address. Sentence4: Their address is Cambridge Leisure Park Clifton Way. Would you also like the phone number? Sentence5: No, thanks. I'll head to Nandos now. Goodbye. Sentence6: Have a nice day! Sentence7: I would like Italian food. Sentence8: I'm sorry, there are no restaurants matching your request. Would you like to try something else? Sentence9: Yes, please give me their number. Sentence10: I don't care. Sentence11: I am looking for a restaurant in the south part of town that is in the cheap price range. Sentence12: I have two restaurants that meet your requirements. Do you have a cuisine preference? Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System