You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please change my reservation?

ASSISTANT: Sure, I am here to help you with this. May I know your good name please?

USER: Thomas Carter here.

ASSISTANT: Ok, please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry Thomas, no reservation found as per your name to change it in your database.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome.