Read the following conversation.

Source: kcballet.org
Nadine: Hi, Mary. Where are you going now? You look in a hurry.
Mary: I'm going to meet a friend of mine at Belle Ballet Course.
Nadine: To go dancing?
Mary: Yes, I have to perform at the farewell party next week.
Nadine: It sounds nice. Can you dance well?
Mary: I am pretty good at dancing.
Nadine: That's great. Well, you better get going. You don't want to be late, right?
Mary: I'll see you next time.
Nadine: Sure. Bye.
Which statement is stating someone's ability?