You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have planned to consult a doctor for monthly check up, due to more emergency operation scheduled to the him on that day my appointed has been cancelled. Can you please help me in cancelling my reservation?

ASSISTANT: Sure, we are here to assist you. May I know your good name to check the reservation list?

USER: Kathleen Roberts here.

ASSISTANT: Please wait a moment. I will check the reservation list and let you know.

USER: Sure, I will be waiting.

ASSISTANT: Thanks for your valuable time. We found a reservation on your name.

USER: Please proceed with cancelling.

ASSISTANT: Your reservation has been cancelled. Amount will be credited in your bank account within four working days.

USER: Thank you for your service in cancelling my reservation.

ASSISTANT: Thank you for choosing our service. Have a pleasant day.