Now I see. I should've phrased what I said earlier like this instead...

Hello, An! What are you up to?

Wait, that's your English textbook!

Are you studying?!

You don't have to sound so surprised...

Have you forgotten that I'm over in the States right now? Isn't it only natural to do what I can to learn how to communicate better?

Hahaha. Very true!

I'm sorry, I was just so shocked.

Alright, now you're just making fun of me.

No, that's not my intention! Anyway, are you feeling hungry at all? I'll be more than happy to make you some pancakes!