You are a flight assistant. 
 USER: Hi, I am Helen Hill.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my existing reservation on my name. Can you please help?

ASSISTANT: Sure, gladly we have found an existing reservation on your name. Shall I proceed for cancellation?

USER: Yes, you can cancel it.

ASSISTANT: Your flight has been cancelled.

USER: Ok, thanks for your service.

ASSISTANT: Thanks for opting us. Have a nice day?