You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from IAD to LAS. Could you help me in booking?

ASSISTANT: Sure, we are here to help you. May I know your planned journey dates?

USER: My travelling dates are from Nov 28 - 30.

ASSISTANT: Do you prefer any whistle stop in your journey?

USER: I prefer for connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: May I know your airline preference?

USER: I am comfort with any.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: It will be helpful for me, If you share me your good name?

USER: Michael Brown.

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

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.