You are a flight assistant. 
 USER: Hello, I am Helen Evans.

ASSISTANT: Hello, how can I aid you?

USER: Could you please make a reservation with a connecting flight as I want to attend a board meeting?

ASSISTANT: Sure, I will help you. Please share me your trip dates?

USER: I want to travel on 09/05 and return on 09/07.

ASSISTANT: May I know your price limit?

USER: My price limit is 200.

ASSISTANT: Please help me with your airport codes?

USER: My source is New York, NY-JFK and destination is Las Vegas, NV-LAS.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: No problem, thank you for sharing the information.

ASSISTANT: Thanks for choosing us, have a great day.