You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Due to an emergency, I want to cancel my reservation,.

ASSISTANT: Sure. May I know your name please?

USER: I am Charles Davis.

ASSISTANT: Please wait for a moment, let me check with your details.

USER: Ok.

ASSISTANT: Charles, there is no reservation found under your name. Can I help you with anything else?

USER: No thanks.