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: May I know your name please?

USER: I am Nancy Johnson.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: sorry Nancy, there is no active reservation found under your name.

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

ASSISTANT: Most welcome.