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: The only expensive Thai restaurant in the center, Bangkok City, doesn't have any availability at that time. Would you like to try something else? Sentence2: I found 14 trains. What day do you want to travel? Sentence3: And what is your destination for that trip? Sentence4: No thank you. I am interested in finding an expensive place to eat in the centre of town. Any recommendations? Sentence5: Thank You! Goodbye. Sentence6: I need a train that leaves Cambridge at 21:30 Sentence7: Alright, you're booked at 11:45 at the Meze Bar Restaurant. Your reference number is UXHS88M3 . Will that be all for today? Sentence8: Yes, that's everything I needed. Thank You! Sentence9: I want to go to London Liverpool Street Sentence10: The price is 16.60 pounds. I have 2 matching trains. One arrives by 23:27 and the other arrives by 01:27. Do you want to book either? Sentence11: Thrusday. Can I also ask the price of these trains? Sentence12: I have many restaurants like that. What kind of cuisine are you looking for? Sentence13: I am looking to book a table for 2 at 12:45 on Thursday at a thai restaurant. Sentence14: Can you change the booking time to 11:45, and try again? Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User