You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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, may I know your name to check for the previous reservation?

USER: Sure, I am Justin Thomas.

ASSISTANT: Please allow me a moment while I check for the reservation status.

USER: Sure.

ASSISTANT: Justin Thomas, there is no reservation found under your name.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for contacting us.