You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book a flight ticket from IAD to HOU?

ASSISTANT: Sure, may I know the travelling dates?

USER: My trip dates are Feb 19 and Feb 21 respectively.

ASSISTANT: Do you have any connection limit?

USER: I prefer for direct flight to travel.

ASSISTANT:  Are there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Anna Evans here.

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

USER: Not an issue. Thank you.