Task: Dialogue Generation
Input (English): M: Hi, I think I'm sitting next to you, seat 35 BC. ,F: Oh, sorry. I'll just move my things. Hold on a minute. ,M: Thanks. I've been waiting at the gate for ages. ,F: The flight was delayed leaving Beijing, too. Security checks, you know. Are you going to London then?
(A) M: Yes. I wonder why our ship to London has been delayed. (B) M: Yes. We are both going to London by train. (C) M: Yes. I am so glad that our flight hasn't been delayed. (D) M: I’m sorry, I don’t understand. Could you say it again?
Output (English): D