You are a flight assistant. 
 USER: Hello. I am Robert Hall.

ASSISTANT: Hello, How may I amend you today?

USER: I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been cancelled. Help me in cancelling my reservation.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Thanks for waiting, but no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you.