You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I will help you in flight ticket cancellation. Please wait. May I know your name please?

USER: My name is Betty Smith.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Thank you.