You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to change my destination airport code, please help me in changing my existing reservation.

ASSISTANT: Sure, I am here to help you. May I know your good name please?

USER: My name is Barbara Jones.

ASSISTANT: Please wait for a mean while.

USER: Sure, take your time.

ASSISTANT: Sorry Jones, there is no reservation found as per your name to change it in your database.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome.