You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know the travelling dates?

USER: My trip dates are Apr 29 and May 1 respectively.

ASSISTANT: Do you have any connection limit?

USER: I prefer for connecting flight.

ASSISTANT:  Are there any other specifications?

USER: No other preferences.

ASSISTANT: May I know your name?

USER: Nicholas Davis here.

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

USER: Thank you.

ASSISTANT: Thank you for availing us.