You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

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

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: My trip dates are Jan 15 and Jan 17 respectively.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I need a direct flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No other specifications for me.

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

USER: Jonathan Anderson here.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Thank you.

ASSISTANT: Thank you for opting us.