You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Wilson.

ASSISTANT: How may I assist you today?

USER: I want to modify my destination airport code because the place where I have to go is not near to that destination airport. Can you please help me to change the details?

ASSISTANT: Sure, please wait a moment.

USER: Thank you for considering my request.  Ok, take your time.

ASSISTANT: Sorry, there are no active reservations on your given name to modify.

USER: That's not a problem for me. Anyhow thanks a lot for checking my ticket status.

ASSISTANT: Thank you for reaching our service.