You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER:  I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that.

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name to check your reservation status?

USER: Myself Carol Green.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we have not found any active reservation on your name in our records.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.