You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my reservation due to my bad health. Can you cancel my reservation?

ASSISTANT: Sure, I will help you. May I know your name?

USER: My name is Lisa Mitchell.

ASSISTANT: Please wait for a while, I will check in the reservation list and get back to you.

USER: Sure.

ASSISTANT: Thanks for being patient, we found a reservation on your name. Shall I cancel it?

USER: Please cancel my reservation.

ASSISTANT: Your flight ticket has been cancelled successfully.

USER: Thank you for helping me.

ASSISTANT: Thank you for availing us, have a nice day.