Hello.
Hello, how may I aid you today from my end?
I made a earlier reservation to attend a  conference, due to some political issues it got postponed. Can you please help with changing my  reservation?
Sure, I am here to help you out. Please provide me your name to amend it.
Thank you. And my name is Rachel Carter.
Sorry Rachel Carter, there is no reservation in our database.
Ok, no issue. Thank you.
Thank you for reaching us.