Task: Dialogue Generation
Input (English): F: Excuse me. I'd like to change this blue jacket I bought last week, for that black one. ,M: The blue one is $19 and the black, $50.
(A) F: I will pay you $31 to change the black one, right? (B) F: I want that black coat, this is $31. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: The black jacket is $69 more expensive than the blue one.
Output (English): A