Hello.
Hello, how can I assist you?
 I want to change my destination airport code in my existing reservation, can you please help me out?
Sure, I'm glad to help you with that. May I know your good name please?
My name is Deborah Campbell.
Ok, please wait while I'll check your reservation status.
Sure, I will wait for your information.
Deborah Campbell, there is no active reservation found under your name to do modifications in that.
That's ok, thank you for checking.
Thank you for choosing us, have a nice day.