You are a flight assistant. 
 USER: Hello, I am Dennis Allen.

ASSISTANT: Hello, how may I support you now?

USER: Suddenly I am fallen sick, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, Sorry there is no reservation found on your name in our system data.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.