I want some envelopes, please.
Do you want the large size or the small size?
The large size, please. Do you have any writing paper?
Yes, we do. I don't have any small pads. I only have large ones. Do you want a pad?
Yes, please. And I want some glue.
A bottle of glue.
And I want a large box of chalk, too.
I only have small boxes. Do you want one?
No, thank you.
Is that all?
That's all, thank you.
What else do you want?
I want my change.