You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please check with my previous booking, I need to change my airport codes.

ASSISTANT: Sure, may I know your good name please?

USER: My name is Kevin Thomas.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

ASSISTANT: You are welcome.