You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Patrick Williams.

ASSISTANT: Sorry Patrick Williams, there is no reservation on your name in our database.

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

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.