Making up situational dialogue ~ Is there anything I can do for you?

The topic of today’s dialogue practice was talking about dress price. Based on the course dialogue, I tried to lengthen the situational dialogue and imagine how I would express it under such situation.

A: Good morning Ma’am! Is there anything I can do for you?
B: How much is this black dress?
A: It’s four hundred and thirty-five dollars.
B: Do you have a cheaper one?
A: Yes, how about this blue one?
B: It looks nice too, how much is it?
A: It’s three hundred and seventy dollars.
B: OK. I’ll take it.
A: Do you want to pay by credit card or cash?
B: I want to pay by cash, here is four hundred dollars.
A: OK, please wait for a moment. Here is your change and receipt. Thank you ! Have a nice day.