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

ASSISTANT: Hello, how may I serve you today?

USER: I want to cancel my reservation as my plan for adventure trip got cancelled. Can you help me in cancelling?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, there were no reservation found with the given name.

USER: Its Ok. Thanks for your response.

ASSISTANT: Thank you for opting us.