USER
Hi, I would like to order a pizza.
ASSISTANT
What would you like?
USER
I would like to order a large bacon, chicken, ranch pizza.
large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
bacon
pizza_ordering.type.topping
pizza_ordering.type.topping
chicken
pizza_ordering.type.topping
pizza_ordering.type.topping
ranch
pizza_ordering.type.topping
pizza_ordering.type.topping
ASSISTANT
I am sorry. Unfortunately, we are out of bacon, chicken, ranch.
bacon
pizza_ordering.type.topping.reject
pizza_ordering.type.topping.reject
chicken
pizza_ordering.type.topping.reject
pizza_ordering.type.topping.reject
ranch
pizza_ordering.type.topping.reject
pizza_ordering.type.topping.reject
USER
Hmmm. Okay. I will take a large BBQ Chicken.
large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
BBQ Chicken
pizza_ordering.name.pizza
BBQ Chicken.
pizza_ordering.name.pizza
ASSISTANT
Would you like onions on top?
onions
pizza_ordering.type.topping
pizza_ordering.type.topping
USER
No thank you. 
ASSISTANT
Anything else for you?
USER
No, just the largest BBQ Chicken pizza, no onions.
largest
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
BBQ Chicken
pizza_ordering.name.pizza.accept
BBQ Chicken pizza
pizza_ordering.name.pizza.accept
no onions
pizza_ordering.preference.accept
onions
pizza_ordering.type.topping
ASSISTANT
The order will be ready in 25 minutes. 
USER
Will I be able to get a receipt when I pick it up? 
ASSISTANT
It will actually be sent in a text message to your mobile phone. 
USER
N/A
ASSISTANT
N/A
USER
N/A
ASSISTANT
N/A
USER
N/A
ASSISTANT
N/A
USER
N/A
ASSISTANT
N/A