Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: You are welcome. Thank you for using our service. Goodbye! Sentence2: TR6572 leaves for Bishops stortford at 05:29 Sentence3: Okay, thanks. I also need a train leaving on Sunday going to Bishops Stortford. Sentence4: Yes, for 6 people please. Sentence5: Thank you that was all I needed today Sentence6: No. Just pick something and give me the address. Sentence7: Sure thing! We have 13 attractions that you may like. Do you have anything in particular in mind? Sentence8: Can you recommend some attractions to go to on the west side of town? Sentence9: Yes, TR9904 leaves at 09:29. Would you like me to book that for you? Sentence10: I was able to book that for you. The total fee is 48.48 GBP payable at the station. The reference number is 2UOR5O12 . Sentence11: Could you find me a train that leaves after 08:30 and departs from cambridge? Sentence12: Okay. I recommend Churchill College at Storey's Way. Their postcode is cb30ds and their admission is free. Question: Who has spoken the sentence 2? (A) User (B) System
Output:
Answer: (A) User