You are a flight assistant. 
 USER: Hi, I am Brandon Brown.

ASSISTANT: Hello, how may I help you today?

USER: Due to heavy thunderstorm, I want to cancel my existing reservation.

ASSISTANT: Sorry, there is no reservation found against your name. Sorry for the inconvenience.

USER: Ok, no issue at all. Thanks for your time.

ASSISTANT: Thanks for opting us. Hope to help you better next time.