You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in changing my recent reservation?

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

USER: I am Samantha Smith.

ASSISTANT: Please wait for a mean while.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: You are welcome.