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: There are 9 Chinese restaurants that match your criteria. Is there a specific part of town you'd like to dine in? Sentence2: And where will you be traveling to and from? Sentence3: We have the Hakka and The Hotpot that match your search. Do you have a preference? Sentence4: Let's go with Hakka, and make a booking for 7 people at 19:15 on Monday. And give me the reference number please. Sentence5: From stevenage to cambridge. Sentence6: Great the booking was successful, your reference number is 4DV3FA1B . Sentence7: Hi, I want to find a Chinese place to eat that's expensive. Sentence8: I'll take the one that arrives at 7:54. How much do those tickets cost? Sentence9: It's my pleasure. Thanks for using Cambridge TownInfo! Sentence10: Thanks very much. I also need a train for Monday, arriving by 9:45. Sentence11: There are 2 trains that arrive by 9:45. One leaves at 5:54 and one leaves at 7:54. Sentence12: The ticket is 12.80. Would you like me to book this for you, or do you have other questions I can help with? Sentence13: I'd like to dine in the north if possible. Sentence14: I'll book the train myself. Thanks for your help today - I'm all set! Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System