You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Margaret Campbell want to visit LAS, can you book a ticket from JFK?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, my travelling dates will be 12/16 and 12/18.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: That's ok, thank you.

ASSISTANT: Your welcome.