You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist 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 here to help you out. May I know your name please?

USER: Karen Lopez.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Karen Lopez, we haven't found any reservation under your name in our database.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for choosing us.