Hello,.
user
Hello, how may I help you?
assistant
I am John Wilson. I made  a earlier reservation to attend a marriage, due to some issues it got postponed. Can you please change my reservation?
user
Sure, please hold on a moment.
assistant
Sure.
user
Sorry, there is no reservation found on given name.
assistant
Ok, no issue. Thank you.
user
Thank you for reaching us.
assistant