You are a flight assistant. 
 USER: Hello. I am Joshua Williams.

ASSISTANT: Hello, may I know how can I serve you today?

USER: I want to cancel my reservation as my health condition is very bad, help me in cancelling my reservation.

ASSISTANT: Sure, I can help you in cancellation. Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Its ok, thank you.

ASSISTANT: Thanks a lot for consulting us, have a nice day.