You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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, may I know your name for the cancellation purpose?

USER: Myself Brandon Lee.

ASSISTANT: Sorry, there is no reservation found in our database.

USER: That's fine, thank you.

ASSISTANT: Welcome, thank you for reaching us.