You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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: I am happy to help you, may I know your name to check your reservation?

USER: Thank you and myself Richard Carter.

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

USER: It's ok, thank you.

ASSISTANT: Thanks for choosing us, have a good day.