You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Richard Robinson. I want to cancel my reservation,can your help me?

ASSISTANT: Sure, we can help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Richard Robinson, we didn't found any reservation on your name to cancel.

USER: Ok, thanks for informing.

ASSISTANT: Thank you for contacting us.