Asking for permision

Aina: Hello mum! There's a extreme them park on Sunday? It's Aina's birthay. Can I go?

Margot: Really, how much is it?
(mum)

Aina: It's 20$! Please, mum! Con I go with Aina?

Margot: No, sorry, you can't.
(mum)

Aina: Why not?

Margot: Beacause you're got exam on Monday.
(mum)

Aina: Yes, you're right.