You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: On which dates would you like me to book a flight ticket for you?

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

ASSISTANT: Do you have any preferences?

USER: I want a connecting flight.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Larry Miller here.

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

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.