You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you aid me to cancel my reservation due to emergency?

ASSISTANT:  Sure, may I know your good name?

USER: William King here.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for opting us.