You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Cynthia Taylor here.

ASSISTANT: How may I assist you today?

USER: I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: My airport codes are ATL and DCA.

ASSISTANT: Please mention your travelling dates?

USER: My travelling dates are 02/25 and 02/27. I want direct flight.

ASSISTANT: May I know your specifications for this travel?

USER: I want to departure on morning and return on afternoon.

ASSISTANT: Sorry, there are no flights running on your journey dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching our service.