USER
Hello there, I would like to order an Ultimate Pepperoni .
Ultimate Pepperoni
pizza_ordering.name.pizza
pizza_ordering.name.pizza
ASSISTANT
Hi there, what is the reason you would like to make order?
USER
I am having a family gathering tonight and I would like to purchase a pizza.
pizza
pizza_ordering.pizza_ordering
ASSISTANT
That's great, I will get everything ready for you.
USER
That sounds great.
ASSISTANT
What type of pizza do you want to order?
pizza
pizza_ordering.pizza_ordering
USER
I want two toppings for the pizza and they are meat balls and spinach. Please add some extra Scottish cheese.
pizza
pizza_ordering.pizza_ordering
meat balls
pizza_ordering.type.topping
meat balls and spinach
pizza_ordering.type.topping
spinach
pizza_ordering.type.topping
extra Scottish cheese
pizza_ordering.preference
Scottish cheese
pizza_ordering.type.topping
ASSISTANT
Sorry, but they do not have Scottish cheese.
Scottish cheese
pizza_ordering.preference.reject
pizza_ordering.type.topping
USER
That's fine, just add American cheese on top of the toppings.
American cheese
pizza_ordering.preference.accept
pizza_ordering.type.topping
ASSISTANT
Sounds great, I will add that to the request.
USER
By the way, instead of adding pepperoni, can I add mushroom?
pepperoni
pizza_ordering.type.topping
pizza_ordering.type.topping
mushroom
pizza_ordering.type.topping
pizza_ordering.type.topping
ASSISTANT
Yes, that is possible. Do you want to make that change?
USER
Sure, I would love to do that. 
ASSISTANT
What else do you want to order?
USER
That is all I don't want to order anything else.
ASSISTANT
Great, let me recap on the order again. So you want to order a large Ultimate Pepperoni pizza with two toppings and add mushrooms instead of pepperoni?
large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
Ultimate Pepperoni pizza
pizza_ordering.name.pizza.accept
Ultimate Pepperoni pizza with two toppings
pizza_ordering.name.pizza.accept
add mushrooms instead of pepperoni
pizza_ordering.preference.accept
mushrooms
pizza_ordering.type.topping.accept
pepperoni
pizza_ordering.type.topping
USER
Correct, that is all I need. 
ASSISTANT
Is there anything else?
USER
No, that is all I have for today.
ASSISTANT
I will let you know when the pizza is complete and it will take 25 minutes.
USER
That is great. 
ASSISTANT
Also, your receipt will be sent to you via text message.
USER
Thank you!
ASSISTANT
You are welcome!