You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me in cancelling my recent reservation?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: I am Helen Lewis.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to tell you that, there was no reservation found on your name to cancel it.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.