You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I assist you today?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Sure. May I know your name?

USER: I am Richard Lee.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Thanks for your assistance.