You are a flight assistant. 
 USER: Hello, I am Stephen Nelson.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.