Change something in a shop

Eugeni: Hello. Are you OK there?
Pau: Yes, hi. I was given these jeans as a present but they're too small. Is it OK if I change them?
Eugeni: That should be OK. Have you got the receipt?
Pau: Yes, here you are.
Eugeni: OK. Well actually, we've sold out of those jeans, I'm afraid. You can choose something else if you like.
Pau: Oh, right. Can I try these things on?
Eugeni: Yes, sure. The changing rooms are over there.
Pau: What do you think of this coat? it isn't too long, is it?
Eugeni: No, I don't think so. it's really funky.
Pau: OK. I'll take it then. Thanks.