USER
Hello, I would like to order some pizza for pick-up?
ASSISTANT
Ok sounds good. What can I get for you today ma'am?
USER
I would like one large pepperoni and bacon pizza on thin crust
large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
pepperoni
pizza_ordering.type.topping
pepperoni and bacon pizza
pizza_ordering.name.pizza
bacon
pizza_ordering.type.topping
thin
pizza_ordering.type.crust
thin crust
pizza_ordering.type.crust.accept
ASSISTANT
Ok what else can i get for you?
USER
An X-large supreme pizza with no onions
X-large
pizza_ordering.size.pizza
X-large supreme pizza
pizza_ordering.name.pizza
supreme
pizza_ordering.name.pizza
no onions
pizza_ordering.preference
pizza_ordering.preference
ASSISTANT
I'm sorry ma'am we are out of x-large crust. Can I get you that pizza in a large instead?
x-large
pizza_ordering.size.pizza.reject
x-large crust
pizza_ordering.type.crust.reject
large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
USER
Yeah that sounds good thank you.
ASSISTANT
OK so I have a large thin crust pizza with pepperoni and bacon and another large supreme pizza with no onions. Is that correct?
large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
thin crust
pizza_ordering.type.crust.accept
thin crust pizza
pizza_ordering.name.pizza.accept
pepperoni
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
bacon
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
supreme
pizza_ordering.name.pizza.accept
supreme pizza
pizza_ordering.size.pizza.accept
no onions
pizza_ordering.preference.accept
onions
pizza_ordering.type.topping.accept
USER
Yes that is correct!
ASSISTANT
Alright can I get you anything else tonight?
USER
No thank you that will be all.
ASSISTANT
Ok your total comes to $23.75 
USER
Thank you my credit card information should be file.
ASSISTANT
Ok that sound great your order will be ready in about 25 minutes!
USER
Thank you very much
ASSISTANT
You are welcome
USER
Have a great night
ASSISTANT
You too
USER
Bye!
ASSISTANT
Bye!