You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to book a flight ticket to attend an business conference meeting at LAS, Can you please help me for booking from LAX?

ASSISTANT: Sure, may I know your name for reservation?

USER: Barbara Lewis here.

ASSISTANT: Please mention your travelling dates.

USER: I would like to travel on 12/30 to return on 01/01.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other specifications to be met?

USER: I am comfortable with economy class and depart on afternoon.

ASSISTANT: Please a hold moment, let me check with the best flight for your journey.

USER: Sure.

ASSISTANT: Sorry, due to heavy snow fall in your travelling place, no flight services are running.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching our service.