USER
Hi. I'd like to order a pizza from Marco's.
Marco's
pizza_ordering.name.store.accept
pizza_ordering.name.store.accept
ASSISTANT
Okay. What do you want to order?
USER
I'd like to get a large pizza with grilled chicken, onions, and black olives.
large
pizza_ordering.size.pizza
pizza_ordering.size.pizza
grilled chicken
pizza_ordering.type.topping
pizza_ordering.type.topping
onions
pizza_ordering.type.topping
pizza_ordering.type.topping
black olives
pizza_ordering.type.topping
black olives.
pizza_ordering.type.topping
ASSISTANT
It looks like they are out of black olives. Would you like to get a different topping?
black olives
pizza_ordering.type.topping.reject
pizza_ordering.type.topping.reject
USER
Sure. Could I add pork sausage to it?
pork sausage
pizza_ordering.type.topping
pizza_ordering.type.topping
ASSISTANT
They do not have pork topping.
pork topping
pizza_ordering.type.topping.reject
pork
pizza_ordering.type.topping.reject
USER
Okay. Could I get green peppers on it instead?
green peppers
pizza_ordering.type.topping
pizza_ordering.type.topping
ASSISTANT
Yes. I can do that for you.
USER
Awesome. Thank you. 
ASSISTANT
So you would like one large pizza with grilled chicken, onions, and green peppers?
large
pizza_ordering.size.pizza.accept
pizza_ordering.size.pizza.accept
grilled chicken
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
onions
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
green peppers
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
USER
Yes, that's correct. 
ASSISTANT
Okay. The total of the order comes to $17.31. Is there anything else you would like to add?
USER
Actually, could I add pepperoni to it as well?
pepperoni
pizza_ordering.type.topping
pizza_ordering.type.topping
ASSISTANT
Yes, you can.
USER
Thank you. 
ASSISTANT
Adding the pepperoni to the pizza makes it come to $19.48.
pepperoni
pizza_ordering.type.topping.accept
pizza_ordering.type.topping.accept
USER
Okay, that sounds fine. 
ASSISTANT
Alright. Your order should be ready within 25 minutes. 
USER
Awesome. Thank you!
ASSISTANT
You're welcome. Also the receipt will be sent to your mobile device via text message.
USER
Alright. Thanks!
ASSISTANT
Have a wonderful day!