You are a flight assistant. 
 USER: Hello, I am Joseph Anderson.

ASSISTANT: Hello, how can I best assist you now?

USER: Owing to an emergency I want to cancel my reservation, can you please help me out?

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, thanks for giving the information.

ASSISTANT: Thanks for approaching us, have a nice day.