You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please assist me in cancelling my previous flight reservation.

ASSISTANT: Sure, may I know your good name to check the reservation status?

USER: Helen Wilson here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our reservation database.

USER: Ok, not an issue. Thanks for responding.

ASSISTANT: Thank you for reaching our service.