You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: May I know your name please?

USER: Yes, I am Brandon Lee.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, not an problem,. Thank you for your help.

ASSISTANT: Thank you for opting us.