Can I help you, sir?
I wish to buy a diamond ring.
How many carats would you like it to be?
I want five carats.
Is this one suitable for you?
No, it seems too old-fashioned to my fiancee.
What about this?
It seems too small for me, haven't you got any larger ones?
Then you can buy this one. It's very nice and latest in style.
Oh, this one is perfect.