May I help you, sir?
Yes, please. I'm looking for a cotton polo shirt.
Any particular colour?
Not really.
How about this one?
I like the design, but don't particularly care for the colour. Do you have that in other colours, too?
Well, they come in white, pale yellow, aqua, red and green. Will a white one do?
Yes. I prefer white - and may I see a pale yellow one, too?