You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help 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, we are here to help you.

USER: Thank you.

ASSISTANT: Please share me your name.

USER: Myself Gary Thomas.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.