I would like to order a large pizza with sausage, black olive and extra cheese.
I can help you with that, but unfortunately we are currently out olives.
Man, I really wanted olives. I guess I can do sausage and pepperoni then.
Did you still want extra cheese with that?
Yes and actually can you add bacon?
We are running a special for a meat lovers that might be cheaper.
Whats on the meat lovers?
It comes with sausage, pepperoni, bacon, ham and beef.
That sounds good, but I really don't like ham.
I can make it without the ham.
Is it cheaper without the ham?
Im sorry it would be the same price, 
Instead of the ham, can I get extra cheese?
Of course.
And there would be no charge for the extra cheese?
I can do that for you, no problem.
Thats awesome, I appreciate it. 
Ok, so that's going to be a large meat lovers pizza with no ham and extra cheese. Right?
Thats it! 
Ok, Ill get that receipt sent over to your mobile device. Have a good one!