Task: Dialogue Generation
Input (English): F: I'm surprised to see you here. Jeremy told me that you were on vacation. ,M: Yeah. We were visiting some relatives in Sydney, but we return last night.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Oh, you visited some friends in Switzerland, didn't you? Then you have been to Switzerland. (C) F: Since you have been to Australia, why didn't you go to Sydney? (D) F: You mean, you've been to Thailand, and you didn't come back until this morning, did you?
Output (English): A