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 TR 1412 arrives at 15:32. Will this be okay? Sentence2: thanks again for choosing us Sentence3: Yes. Please book it for 1 person. Sentence4: I booked your ticket, and your reference number is DBWTXCO1 . Can I help further today? Sentence5: You have been helpful. Good bye. Sentence6: I am going to cambridge from Broxbourne. Sentence7: Where will you be traveling to? Sentence8: I'm looking for a train. The train should arrive by 16:00 and should leave on saturday. Sentence9: No that's it! Thanks so much! Sentence10: Thank you. Goodbye. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User