Hi. I am Eric Jackson.
Hello, How can I aid you today?
Owing an emergency want to change my reservation, so can you help  me with it please?
Ok, I am here to assist you.
Thank you.
Please wait for sometime.
Ok.
Thanks for waiting, we did not find your name in the reservation list to proceed next.
That's ok, thank you for the information.
Ok, Thank you for opting us.