You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

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 happy to help you with that. Can I have your good name please to check your reservation status?

USER: Christine Clark.

ASSISTANT: Ok,  please wait a moment.

USER: Ok.

ASSISTANT: Sorry Christine Clark, no reservation has found under your name to change.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.