Task: Dialogue Generation
Input (English): M: Hello, Mary, how are you today? I hear you weren't well last week. ,F: I'm much better now. Thank you. ,M: What was the matter? Nothing serious I hope. ,F: Oh, no, I had a bad cold and had to stay in bed for 2 days. ,M: I'm glad you're better. Anyway, I hope it was the last cold of the winter and not the first cold of the summer. What about your friend Dan? I hear she's ill, too. ,F: She was ill, but she's all right now. I think she caught my cold. ,M: Everybody seems to have one now. I expect it's the sudden change of weather, 1 day hot and the next day cold. ,F: And very windy, too. That's why I'm wearing a sweater today. What do you think of it? Pretty, isn't it? ,M: It certainly is. It must have cost a lot. Where did you find it? ,F: Oh, I got it at a sale. It was quite cheap. ,M: Really? Well, Mary, I must say it suits you very well. What a pity we men can't wear beautiful sweaters. ,F: Never mind. Let's go and buy one like it to send to your sister Linda in America. ,M: Now that's very kind of you, Mary. I'm really thinking of sending her a present.
(A) F: It doesn't matter, honey. Since I'm your wife, if you don't want to send a present to your sister Linda, forget it. (B) F:  Oh, brother, why don't you want to send Linda a present? (C) F: You're welcome. We're friends. (D) F: I am afraid I did not quite catch what you were saying. Please repeat it.
Output (English): C