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