Task: Dialogue Generation
Input (English): M: Excuse me, I'm mailing this package to Japan. ,F: Alright. Fill out this form about the contents and value. Do you want to insure it? ,M: I don't think so. It's only some books. ,F: Are you sending it surface mail or airmail? ,M: Airmail, please. ,F: OK. That's $25. ,M: Here's $30. ,F: Alright. Here's your change.
(A) M: So, as I'm mailing this package to China, it's free and the change is $ 30? (B) M: So, it needs $25, and as I give you $30, the change is $ 5? Okay, I see. (C) M: I am really sorry, I did not catch that. Would you slow down, please? (D) M: You mean the change is just $ 5? But you say that's $20, and I give you $30!
Output (English): B