You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brandon Thomas.

ASSISTANT: How can I assist you for the day?

USER: I need your assistance in cancel my recent reservation, due to health problem?

ASSISTANT: Sure, We are here to assist you.

USER: Thank you.

ASSISTANT: We are very sorry to inform you that, There is no reservation found on Brandon Thomas.

USER: Ok, Not a big problem.

ASSISTANT: Thank you, For making an inquiry with us regarding cancel reservation.

USER: Thanks for your response.

ASSISTANT: Have a nice day.