Hello.
Hello, how may I assist you today?
I have reserved a ticket to attend a function but suddenly it got postponed. So please help me with changing my reservation.
Sure, can I know your name?
Thank you. Myself Timothy Mitchell.
Ok, please wait.
Sure, take your time.
Thanks for waiting, there is no reservation found on your name.
I will check my mail and revert  you back if anything wrong about my reservation. Anyway, thank you for your time.
Thank you for reaching us.