I need to reserve a flight. Help
May I have your name, please?
John
Can I have your flight ID, please?
240
Sorry, but the flight with id '240' is not available any more.
Not good. The world is depending on me
I checked again, it is still unavailable. 
It's fine. Thanks anyway
Is there anything else that I can do for you?
No,  I'm good
Thank you and goodbye.