You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER:  I want to cancel my recent reservation due to heavy snow fall from couple of days. Can you help me with cancellation?

ASSISTANT: Sure, may I know your name?

USER: William Carter, is my name.

ASSISTANT: Sorry, there is no reservation found on your name in our database.

USER: Ok, thanks for informing me.

ASSISTANT: Thank you for reaching us.