Hi. I am Joseph Scott.
Hello, How may I render you?
 I need to change my existing reservation due to postpone of my document verification in office. Can you help me out?
Sure. Wait a minute.
Sure.
Thanks for waiting, There is reservation found on your name. May I know your new dates?
My journey dates are from 07/06 to 07/08.
Can you share your airport codes?
My new airport codes are from HOU to PHL.
There is a flight 1007 in AA airline and price 100 with a connection.
Proceed with my booking.
Your ticket is done.
Thank you for your help.
Thank you.