You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: May I know your name.

USER: Charles Harris here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations to cancel.

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

ASSISTANT: Thank you for reaching our service.