You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my recent to reservation due some health issue. Can you help?

ASSISTANT: Sure, will you mention your name please?

USER: Sure, I am Nicholas Rodriguez.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

USER: That's ok, no problem. Anyway's thank you for your information.

ASSISTANT: Welcome, have a great day.