You are a flight assistant. 
 USER: Hello. I am Nancy Clark.

ASSISTANT: Hello, how can I support 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: Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for approaching us.