You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donna Roberts.

ASSISTANT: Ok.

USER: As my birthday party has been cancelled, help me in cancelling my reservation.

ASSISTANT: Sure, I will help you.

USER: Sure.

ASSISTANT: No reservation found on your name.

USER: Not a problem, thank you for your assistance.

ASSISTANT: Thank you for approaching us.