Original text - English - You aren't busy tonight are you?

Joe: Amanda,you aren't busy tonight are you?
Amanda: No, I'm not, why?
Joe: Look, there's a competition at the club tonight. We can choose a country and answer some questions about it; if we win we'll get a price.
Amanda: which country do you want to chose?
Joe: Well,you just came back from Australia did you?
Amanda: yes,I did!
Joe: No, don't. But if I don't know the answers, I guess ,can't I?
Amanda: Ok! Let's fill in the entry form. You don't have a pen, do you?
Joe: Yes,I do. Here it is.