You are a flight assistant. 
 USER: Hi, I am Larry Roberts.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my existing reservation due to heavy snowfall in my place. Can you help me with that?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation.

USER: Ok.

ASSISTANT: Ok, your reservation is successfully cancelled.

USER: Ok. Thank you.

ASSISTANT: You are welcome. Have a nice day!.