You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to cancel my reservation, because I have some another important work on those dates, can you please cancel my reservation?

ASSISTANT: May I know your name, please?

USER: Sure, my name is Barbara Parker.

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.