You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Walker.

ASSISTANT: How can I aid you?

USER: Owing to an emergency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: Sure, please allow me a moment to check for your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting. Sorry to say, there is no active reservation have been found under your name in our database to cancel it.

USER: Ok, not an issue. May be my brother has cancelled my reservation on behalf of me.

ASSISTANT: Thank you for contacting us.

USER: Thank you for providing information.