Hello.
Hello, how may I be at your service today?
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
May I know your name please to check the status of your reservation?
I am Jack Lee.
Thank you. Please stay online for a while, I will check your reservation status and let you know.
Sure.
Sorry, there is no reservation matching with your name in our portal.
That's ok, thank you for checking.
Thank you for reaching us.