You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: Please cancel my recent reservation.

ASSISTANT: Ok, may I know your name please?

USER: I am Barbara Hill.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Thank you.

ASSISTANT: Thank you for opting us.