Excuse me?
Yes. Can I help you?
Well, I bought this skirt here yesterday afternoon. But I got the wrong size. It's too small for my daughter. I wonder if I could refund it.
Yes, you could if it's kept intact. But don't you want to get a bigger size?
I intended to, but as far as I know, all the skirts of this kind here are of the same size.
Are they? In that case, I'll be glad to give your money back.
Sorry to have given you trouble.
Never mind. It's just my duty.