Hello.
Hello, how can I serve you today?
 Due to sudden health issue, I am not able to travel in a flight on those date that I want to travel. So, I would like to change my reservation. Can you please help me out with that?
Sure, I will help you.
Ok.
May I know your good name?
Myself Laura Johnson.
Please wait for a while, I will check in the reservation list and get back to you.
Ok, I will be waiting.
Thanks for being patient, there is no active reservation found on your name to change.
That's ok, thank you for the information.
Thank you for choosing us.