You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to cancel my recent reservation. Could you help me with that?

ASSISTANT: Ok, I am here to help you with that. May I know your good name?

USER: Sarah Davis.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

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

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.