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

ASSISTANT: Hello, Brandon Miller.

USER: I just want to cancel my recent reservation, can you please help me in cancellation?

ASSISTANT: Sure, I will help you. Please allow me a minute.

USER: Sure.

ASSISTANT: Brandon Miller, I am sorry to inform you that there is no active booking done on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us. Have a great day.