You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I aid you?

USER: I am unable to travel to airport to board my flight due to severe accident in my way to airport. Can you help me in cancellation?

ASSISTANT: May I know your name?

USER: I am Janet Jackson.

ASSISTANT: We cancelled  your reservation.

USER: Thanks for the help.

ASSISTANT: Thank you.