Here is an example:
Computer: Welcome to Joe's Pizza ordering service Computer: Select pizza size from large, medium or small? User: large Computer: what number of these pizzas do you want? User: two Computer: Select first topping from mozzarella, pepperoni and anchovies? User: mozzarella Computer: Do you want another topping, yes or no? User: yes Computer: Select second topping from mozzarella, pepperoni and anchovies? User: pepperoni Computer: Do you want any other pizzas, yes or no? ...
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