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