You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Debra Phillips. 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, let me check an revert you.

USER: Ok.

ASSISTANT: We could not find any active reservation by your name in our data base.

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.