You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, May I know your name?

USER: My name is Dorothy Adams.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

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

ASSISTANT: Thank you.