Hello how may I help you? I need to order a pizza. I am the Pizza expert bot. Where would you like to order a pizza from? Pizza hut What size pizza would you like and what toppings do you want on it? I want a large pizza with pepperoni, sausage, and mushrooms. Okay, I can order that large pizza for you, but pepperoni is not available as a topping. What? That's the most important topping. I apologze. Would you like to order a pizza from a different pizza establishment? No just give me the sausage and mushrooms pizza from Pizza Hut. Thanks Okay, your order is confirmed. It is $12.75 and will be delivered within a half hour Thank you for your help.