Task: Dialogue Generation
Input (English): M: Hello, do you have the best of Mozart? ,F: I'm sorry. We've just sold out, but we can order one for you. If you give us your number, we'll call you when the CD arrives.
(A) M: Thank you, you are really helpful. (B) M: I am really sorry, I did not catch that. Would you slow down, please? (C) M: It's so generous of you to give me the CD for free. (D) M: It will be more helpful if you can tell me when will the Beethoven CD arrives approximately.
Output (English): A