You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Brandon Harris here.

ASSISTANT: How may I assist you today?

USER: Owing to an emergency, I had to request for this cancel reservation.

ASSISTANT: Sure, I will help you Brandon Harris. Ok, please wait a moment, I will check your previous reservation status.

USER: Ok fine.

ASSISTANT: No previous reservation found on your name Brandon Harris. Do you want to know any thing else from us?

USER: No that's ok, thank you for your help.

ASSISTANT: Thank you for contacting us, have a good day.