Approaching bookstores.

I am in the process of trying to develop my sales skills. To acquire sales skills. To have anything remotely resembling sales skills.
Actual conversation from a few hours ago. I am buying books for gifts and have just given my information to be on the bookstore's favored customer list, or whatever it is called. 
I make my move. 
"Do you know, do you sell many coloring books?"
"Yes, we sell coloring books for children and grown ups."
"Yes. I mean, are they selling?"
"I think we sell a couple a week."
"Oh." 
Purchases books and leaves store.
Needs a little fine tuning, my salespitch.