Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: That's okay. No need to book now. But can I get the travel time for that train? Sentence2: There are a number of trains to choose from. What time would you like to depart? Sentence3: What is the earliest departing train and the price of a ticket for it? Sentence4: Departure time is flexible but I would need to get into Cambridge by 21:30. Sentence5: There are 15 trains that arrive by 21:30. Each train takes 1 hour. When would you prefer to depart? Sentence6: Okay, thanks! that's all I needed! Have a good day! Sentence7: The earliest train departs at 05:32 and is 17.90 pounds. Would you like a ticket? Sentence8: I am looking for a train on Wednesday departing form broxbourne Sentence9: I'm heading into Cambridge. Sentence10: The travel time for the train is 60 minutes. Sentence11: There are many results. Where is your destination? Sentence12: Glad I could help! Question: Who has spoken the sentence 2? (A) User (B) System
Output:
Answer: (A) User