Hello.
Hello, how may I be at your service today?
 I am planning to change my destination airport code in my existing reservation, can you please help me out? My name is Thomas Parker.
Sure, we are here to help you. Ok, please be on hold.
Ok, take your time.
Sorry, there is no reservation found on your name in our database.
That's ok, thank you for the response.
Thank you for choosing us.