You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How shall I assist you?

USER: Please assist me in cancelling my ticket, due to heavy snowfall at my hometown. Can you help me with that?

ASSISTANT: Please provide your name?

USER: Sure, Donald Baker is my name.

ASSISTANT: Ok. Reservation is not available.

USER: Ok, thanks for the information.

ASSISTANT: Thank you.