Hello.
Hello,  how can I aid you today?
I would like to change my flight reservation as my trip got postponed, can you please help me?
Sure, may I know your name?
John Green.
Please wait for a while, let me check your reservation status.
Ok, take your own time.
Sorry, I did not find any reservation by your name in our database.
Ok, thank you for the information.
Thanks for reaching us.