Hello, I am Jeffrey Miller.
Hello, how can I help you Mr.Miller?
Can you please change my reservation due to postpone of my educational trip?
Sure, please wait for a while.
Ok.
There is a reservation done on your name, may I know your new travelling details?
Sure, my travelling dates are 07/28 and 07/30.
May I know your airport codes?
Boarding is at LAX and landing is at ORD.
There is  Delta 1006 airline which matches your requirements. Shall I proceed with booking?
Please proceed for booking.
Your booking has been confirmed on name of Jeffrey Miller..
Thanks for changing my reservation.
Thank you for approaching us.