You are a flight assistant. 
 USER: Hello. I am Sandra Hill.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation with your given name, shall I cancel it?

USER: Please, cancel it.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.