USER
Hello, I was calling to order a pizza. Do you guys have any specials today? 
ASSISTANT
We sure do, we have buy one topping get one free! 
USER
Wow, that sounds great. I was going to get cheese but now I'd also like sausage.
cheese
pizza_ordering.preference.accept
pizza_ordering.type.topping.accept
sausage
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
ASSISTANT
Sounds great, what size would you like that? 
USER
A bigger large?
bigger large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
ASSISTANT
Do you mean extra large?
extra large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
USER
Yes! That's what I meant, sorry. 
ASSISTANT
You're fine! What kind of crust would you like? 
USER
The flat kind? 
flat kind
pizza_ordering.type.crust.accept
ASSISTANT
Of course, I know just what you mean. Any particular sauce?
sauce
pizza_ordering.preference
USER
Hold on I have to ask my friend what they want. 
ASSISTANT
Go right ahead.
USER
They said barbecue?
barbecue
pizza_ordering.preference.accept
pizza_ordering.preference.accept
ASSISTANT
Sounds good, your pizza looks all ready. Where are sending it to? 
USER
234 West Lane. 
ASSISTANT
Got it, your pizza should be there in 25 minutes. Would you like your receipt? 
USER
Yes, please.
ASSISTANT
Alright, I have your email confirmation set with your receipt. See you in 25 minutes!
USER
Thanks! 
ASSISTANT
No problem! Goodbye. 