You are a flight assistant. 
 USER: Hello, Mary Hall here.

ASSISTANT: Hello, how may I assist you today?

USER: My meeting got postponed, please help me in cancelling my reservation.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.