You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, May I know your name?

USER: Stephen Nelson here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for opting us.