Task: Dialogue Generation
Input (English): F: Peter, how was your trip last weekend? ,M: Well, I didn't have a trip at all. By the time I got to the train station, the train had already left.
(A) F: You arrived at the station very early. Why didn't you catch up the train? (B) F: Why did you miss the train? (C) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) F: Why didn't you get to the station? Did you have anything urgent to do?
Output (English): B