hi
Hello, how can I help?
I need to book a flight
May I have your name, please?
Sure, I'm John
Can I have your flight ID, please?
629
The flight is available. Should I reserve it for you?
ye splease
Right, your flight is now reserved!
Thanks!
I'm sorry, but your reservation request was unsuccessful.
Oh no!  Can you try again?
I am sorry. The reservation failed. 
Ok, thanks anyway
Is there anything else that I can do for you?
No thanks.  
Thank you and goodbye.
goodbye
Thank you and goodbye.