Hello, myself Dennis Anderson.
user
Hello, how may I help you today?
assistant
I want to change my destination airport code in my existing reservation, can you please help me out?
user
Sure, please wait for a moment.
assistant
Ok, take your time.
user
Sorry to say that, there was no reservation found with your given name.
assistant
It's ok, thank you for the information.
user
Thank you for opting us.
assistant