I would like to order a two topping pizza.
I would be happy to help with that 
I need to order 1 pizza for dinner tonight with my family. 
what type of pizza would you like 
I want the Hawaiian pizza but I would like to exchange the ham for sausage
sorry sausage is not an option, is there something else you would like instead
ok switch the ham to pepperoni then
will make a note of that, do you want anything else
no just the pizza please
can I confirm your order now
yes please do
so you would like a Hawaiian pizza replacing the ham with pepperoni
that is correct 
and nothing else for tonight 
that is correct
your pizza order is complete
thank you
it will be ready in 25 minutes from now