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