You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Brown.

ASSISTANT: How may I help you?

USER: I need to cancel my reservation due to my planned event got cancelled. So please help me with cancelling my reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal. Thank you for reaching us.

USER: I did not get any information regarding cancellation of my reservation. Anyway, thank you for your time.