Hello.
Hello, how can I aid you?
I would like to change my flight reservation as my trip got postponed, can you please help me?
Sure, I am here to help you. May I know your name to check with existing reservation?
Lisa Green here.
 I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
Ok, no issues. Thank you for checking.
Thank you for opting us.