A : Can I help you, sir?
B : I'd like some leather shoes, please.
A : Any particular color?
B : Black.
A : OK. What's your size?
B : I don't know American sizes.
A : No problem. Put your foot here. Yes, you're a six. Just a moment please. Here you are. These are very comfortable. Try these on.
B : Yes, they're very nice, but I want slip-ones.
A : How about these? They don't have laces. Try them.
B : Fine. I'll take these.