Having known and worked with a few effective salespeople one of the qualities about them that seems to lead to their success is their unabashed pride in having almost no reserve.
Things you and I would be embarrassed to admit we were even thinking they're already smiling, introducing themselves, and crossing all sorts of lines of sensible dignity.
A "dignified salesperson" is an oxymoron.
It would be tantamount to a "dignified prostitute".
"What?! You want to put your what in my where after the other where?! Oh, no! I couldn't do THAAAAT!" 

I think that's pretty f***ing great!
You found a f***ing hook!
Reel 'em f***ing twitter fish in!