You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may 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: I am happy to help you and please share your name to proceed further as per your request?

USER: Sure, Michael Campbell here.

ASSISTANT: Sorry, no reservation found in our database.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.