You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Help me in cancelling my reservation?

ASSISTANT: Ok, may I know your name to check your reservation?

USER: I am Barbara Jones.

ASSISTANT: Ok, please wait.

USER: Ok.

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

USER: That's ok, thank you.