Hello.
Hello, How may I support you today?
 I want to change my recent reservation as my joining date got postponed. Can you help me in changing?
Sure, May I know your name to change your reservation?
My name is Larry Lewis.
Please wait for a couple of minutes.
Sure.
Thanks for waiting, we did not find any reservation on your name to change your reservation.
That's ok, no problem. Anyway thank you for checking.
Thank you for consulting us.