You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help are you seeking from our side?

USER: I am planning to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: Ok, please share your name to check with your reservation status.

USER: Sure, my name is George Adams.

ASSISTANT: Ok, please allow me to check with your booking now.

USER: Ok, take your time.

ASSISTANT: I am very regretful to inform you about it, but there is no reservation found by your name in our database.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for approaching our agency. Have a nice day.