You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: May I know your name please?

USER: I am Joseph Moore.

ASSISTANT: I found your reservation on your name and I have been cancelled successfully.

USER: Thank you.