You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Debra Brown here.

ASSISTANT: How can I assist you?

USER: I was made a reservation to Chicago earlier in this week. But suddenly I am not able to go there because of the health problem. So can you please help me for cancelling my reservation?

ASSISTANT: Sure Brown, I will you help you to cancel your previous reservation. Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Brown, there is no reservation found on your name to cancel.

USER: Anyway, thank you for the information.

ASSISTANT: Welcome. Thank you for choosing us.