Customer: Good morning!
Shop assistant: Good morning! Can I help you?
Customer: Yes, please. I need a new jeans. 
Shop assistant: size small or medium? 
Customer: Small, thanks.
Shop assistant: Okay, wait a moment please. Here they are!
Customer: Oh thank you! And can I try them on, please?
Shop assistant: Sure, the dressing rooms are over there.
Customer: I see.
Shop assistant: Well, what are they like, madame?
Customer: Oh, they are great! How much do they cost?
Shop assitant: They are 45£.
Customer: Can I pay by credit card?
Shop assistant: Of corse!
Customer: Thank you, bye bye.
Shop assistant: Good bye, have a nice day!