You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I just want to cancel my recent reservation, due to health issues.Can you please help me?

ASSISTANT: Sure. May I know your name to check the flight availability?

USER: Sure, my name is Nicholas White.

ASSISTANT: There is no flight reserved on your name.

USER: That's really sad. Thank you for your information.

ASSISTANT: Most welcome.