In this movie fragment we can see a man asking politely for some crisps. He uses the construction: MAY I HAVE...?, which is a bit more formal and polite than CAN I HAVE...?

- May l have one of those, madam?
- Madam? What are you calling me madam for? They're ladies' glasses.
- Look, see? lt's right here.
- Gloria Vanderbilt Collection.
- He sold me ladies' glasses!