You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Robinson.

ASSISTANT: How may I assist you?

USER: Would it be possible to cancel my reservation?

ASSISTANT: Sue, I will help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no reservation found on your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing us.