You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Patrick Roberts. My business meeting was cancelled, so please cancel my recent reservation.

ASSISTANT: Okay, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find your reservation in our reservation list.

USER: No problem, thanks for your help.

ASSISTANT: Thank you for opting us.