You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Debra Anderson. My client meeting was cancelled, so please cancel my reservation.

ASSISTANT: Sure, please wait for a minute, I will check whether your reservation existed or not.

USER: Sure.

ASSISTANT: Thanks for waiting, we have not found any reservation with your given name.

USER: No problem, thanks for your help.

ASSISTANT: Thanks for choosing us.