You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Sure. 2 people at 20:30 on Tuesday. Please give me the reference number. Sentence2: Nope that should be it thank you Sentence3: There are many trains leaving after 11:15, the closet one leaving to that time will be at 11:40 and arrives at 14:23. Sentence4: Your request has been completed. The reference number is TTH2AA7N . Sentence5: I am looking for a train departing after 11:15 from the Birmingham new street location. Sentence6: Will that be 1 ticket on the 13:40 train from birmingham new street to cambridge, then? Sentence7: Alright, you're all booked! The reference number is LW1N1DLA . Is there anything else I can help you with today? Sentence8: Okay, I need one going to Cambridge on Tuesday. Sentence9: Thank you, if you need anything else please contact us. Sentence10: No, actually I'll need tickets for two people please. Oh, and can you provide the reference number when you've got it please? Sentence11: What is your preferred arrival time? Sentence12: I have 2 results for mediterranean restaurants. One is la mimosa in town centre. Would you like me to make you a reservation? Sentence13: Thanks. I also need an expensive restaurant serving Mediterranean food. Sentence14: I don't have a preferred arrival time. Could you just book me one for 13:40? Question: Who has spoken the sentence 10? (A) User (B) System
A:
Answer: (A) User