Hello.
Hello. Could you please tell me which help you are looking from our agency?
I am planning to change my destination airport code in my existing reservation, can you please help me out?
Sure, I am here to help you with in ticket changing process.
Thank you.
May I know your name please?
Sure, my name is Gregory Walker.
Ok, please let me check your ticket status.
Ok.
There is no reservation in our database with the name you have provided. Sorry for the trouble which is caused to you.
It's ok, thank you for the information.
You are most welcome.  Thank you for opting our flight agency.