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 their telephone number is 01223446100. Is there anything else I can help you with today? Sentence2: Cherry hinton water play is in the east area. Would you like the address? Sentence3: I'm sorry, there must be some confusion. I am unable to make a reservation at a park. Were you looking for something else? Sentence4: Yes. I have five parks. Is there a particular area you are looking in? Sentence5: Hi there. Can you assist me in finding a park in Cambridge? Sentence6: You are welcome. Thank you for contacting Cambridge Towninfo Centre. Sentence7: Yes could you make me a reservation there for 8 people at 13:45 on Sunday? I will need a reference number as well. Sentence8: I don't need the address, but could I get a phone number? Sentence9: I have confirmed your reservation for Sunday at 13:45. Your reference number is ECMLT2OE . Do you need help with anything else? Sentence10: Sorry, I'd like to make a reservation for 8 people at the Pizza Hut Cherry Hinton for 13:45 on Sunday. I need a reference number, too. Sentence11: Are there any in the east part of town? Sentence12: That should be everything, thank you for your help today! Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System