You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help 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: May I know your name please?

USER: Myself Helen Martin.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.