You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best I can serve 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, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Steven Robinson here.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time. Sorry to inform you that, we could not find any reservation on your name.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.