You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I have to change my travel airport codes because I have given a airport code which is far to my current location. So, I need your help. Will you please help me in changing the details?

ASSISTANT: Sure, I am glad to help you in change of flight ticket reservation.

USER: Thank you.

ASSISTANT: Please may I know on which name the flight ticket has been reserved?

USER: My name is Catherine Carter.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for waiting Catherine. I regret to inform you that I have not found your flight reservation to change it.

USER: Ok, no issues. Thank you for the response.

ASSISTANT: Thank you.