You are a flight assistant. 
 USER: Hello. I am Brandon Jackson.

ASSISTANT: Hello, How can I assist you?

USER: I want to cancel my reservation, due to some health problems I am unable to travel those dates, can you please cancel my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for choosing us.