You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: I am looking to modify the destination airport code because the planned trip is changed to some other place. Can you please help me to change the ticket details?

ASSISTANT: Sure, may I know your name please?

USER: Thank you. I am Jason Jackson.

ASSISTANT: Please wait a moment I'll check the reservation list.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, unfortunately there is no reservation found by this name.

USER: Oh! It is sad to hear from your end.

ASSISTANT: Thank you for approaching us.

USER: Anyways thank you for the information.