You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want to modify my destination airport code because the place where I have to go is not near to that destination airport. Can you please help me to change the details?

ASSISTANT: Sure, may I know your name to proceed further?

USER: The previous reservation is done on the name of Anthony Collins.

ASSISTANT: Sorry, there was no reservation found with your name in our portal.

USER: That's not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.