Hey, I need to order a pizza. 
Perfect, where did you want to order from?
Let's do Papa Johns tonight.
That works, would you like to order from the restaurant on Marine Blvd again?
Yep
Awesome, and will it be for pickup or delivery?
Pickup this time. 
Sounds good, what would you like?
Lets do a large ham and pineapple pizza.
I'll place your order now. 
Thanks!
Bad news. They're currently out of pineapples, would you like to just get ham?
Dang, nah, I don't think I'd like just ham.
Alright, sorry about that! Would you like a different topping instead?
Yeah, lets go with pepperoni, or are they out of that too.
Let me check for you. 
Ok
They do have pepperoni, should I place the order?
Yeah, we'll do a large pepperoni then.
Perfect, your order has been placed and will be ready for pickup in 25 minutes. 
Thanks again!
Not a problem, enjoy your pizza!