You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket from IAH to LAS, Can you please help me for booking?

ASSISTANT: Sure, help me with the trip dates?

USER: I would like to travel on 11/19 to return on 11/21.

ASSISTANT: May I know your name please?

USER: Betty Roberts here.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a direct flight.

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

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

ASSISTANT: Thank you for reaching us.