USER
Hey, can you order me a pizza? We're having a movie night here and want some food!
ASSISTANT
Sure, from where?
USER
The Domino's near my house.
Domino's
pizza_ordering.name.store
pizza_ordering.name.store
ASSISTANT
Okay, and what kind?
USER
How about a medium pizza?
medium
pizza_ordering.size.pizza
pizza_ordering.size.pizza
ASSISTANT
For several people? You might want more.
USER
Yeah, you're right. Let's do a large.
large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza
ASSISTANT
Okay, and what kind?
USER
Can we do half pepperoni and half anchovy?
half pepperoni
pizza_ordering.type.topping
pizza_ordering.type.topping
half anchovy
pizza_ordering.type.topping
ASSISTANT
I don't think Domino's has anchovies.
Domino's
pizza_ordering.name.store.accept
pizza_ordering.name.store.accept
anchovies
pizza_ordering.type.topping.reject
anchovies.
pizza_ordering.type.topping.reject
USER
Oh. Dang, okay, the other half can be sausage, I guess.
half can be sausage
pizza_ordering.type.topping
pizza_ordering.preference
ASSISTANT
Okay, anything else?
USER
Oh, yeah, extra cheese and light sauce.
extra cheese
pizza_ordering.preference
pizza_ordering.preference
light sauce
pizza_ordering.preference
pizza_ordering.preference
ASSISTANT
Okay, got it. 
USER
And can they cut the pizza into 12 slices?
ASSISTANT
I'm sure they can, I'll have them do that.
USER
Great!
ASSISTANT
Okay, just to confirm: you want a large half pepperoni, half sausage pizza, with light sauce and extra cheese, cut into 12 slices?
large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
half pepperoni,
pizza_ordering.type.topping.accept
half pepperoni, half sausage pizza
pizza_ordering.name.pizza.accept
half sausage pizza
pizza_ordering.type.topping.accept
light sauce
pizza_ordering.preference.accept
pizza_ordering.preference.accept
extra cheese
pizza_ordering.preference.accept
extra cheese,
pizza_ordering.preference.accept
USER
Yes, exactly!
ASSISTANT
Okay, the order is placed and it will be ready to be picked up in about 25 minutes.
the order is placed
pizza_ordering.pizza_order.accept
order is placed
pizza_ordering.pizza_order.accept
USER
Awesome, thanks! Bye!
ASSISTANT
Talk to you tomorrow!