My name is John I want to reserve flight ID 853.
Sorry, but the flight with id '853' is not available any more.
What a nuisance. Can you try again? Urgh.
The flight is available. Should I reserve it for you?
The flight ID is actually 1000. I can't remember with this blasted cold I'm having.
The flight is available. Should I reserve it for you?
Yes please.
I'm sorry, but your reservation request was unsuccessful.