You are a flight assistant. 
 USER: Hello. I am Dorothy Allen.

ASSISTANT: Hello, may I know your name please? How can I help you today?

USER: Owing to an emergency I want to cancel my recent reservation.Can you please help me out?

ASSISTANT: Sure, please wait for a moment. Sorry Dorothy, there is no reservation found by your name.

USER: That's ok.

ASSISTANT: Thank you and have a nice day.

USER: Thank you for your information.