Hello, this is Donna Hernandez.
Hello, how can I assist you?
As part of my schedule, I have booked flight ticket to attend business meet in the month of July. unfortunately the meeting got postponed to next month so, I want to change my existing reservation. Can you help me in changing reservation?
Ok, but according to  your name we do not have any flight reservation to change.
OK, thanks for providing information.
Thanks for contacting us.