You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I aid you today?

USER: Please book a ticket from Austin, TX-AUS to Washington DC-IAD.

ASSISTANT: Sure. Do you need any requirements?

USER: Price limit is 500. Please provide direct flight.

ASSISTANT: Can you help me with your journey dates?

USER: Departure is by 11/26 and will return on 11/28.

ASSISTANT: Thanks for your details. Sorry to say that, there is no flight running on your locations due to abnormal weather conditions.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Amy Campbell.

ASSISTANT: Thank you for availing us, have a great day.