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