You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Allen.

ASSISTANT: How may I assist you?

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: Ok, please allow me to check with your previous booking for a moment.

USER: Ok.

ASSISTANT: Sorry to tell you, there is no active reservation found by your name.

USER: That's Fine.

ASSISTANT: Thank you for approaching our agency.

USER: Thank you.

ASSISTANT: Have a nice day.