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: You too, thanks for calling. Bye Sentence2: Yes, I would like to make a reservation for this Saturday. Sentence3: I would be happy to help you. Can you please provide the number of people to reserve for as well as the number of days you will be staying. Sentence4: that sounds nice Sentence5: There are a lot of expensive restaurants in the area what type of food are you looking for? Sentence6: No thanks, have a good day bye. Sentence7: In a moment. I also need to find a restaurant in the expensive price range. Sentence8: Would you like me to book that? Sentence9: There is saigon city,they serve asian oriental and the address is 169 High Street Chesterton Chesterton. Sentence10: Yes, it is a 3 star guesthouse in the west. Address is 96 barton road. Would you like me get a reservation for you? Sentence11: Hi! I've heard of a great hotel called Hobsons House and I'd like to stay there. Can you help me locate it? Sentence12: Can you suggest one in the north? And please give me the address for it. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System