You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Janet Thompson.

ASSISTANT: How can I help you?

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

ASSISTANT: Janet, I am willing to help you for this. Let me check your reservation status in our records.

USER: Sure, take your time.

ASSISTANT: Janet sorry to inform that, no reservation is found with your criteria.

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

ASSISTANT: Thank you Janet for utilizing our agency.