You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I would like to travel from DCA to EWR as a holiday trip. Can you do the reservation?

ASSISTANT: May I know your good name please?

USER: Richard Jones here.

ASSISTANT: When are you willing to travel for this journey?

USER: My trip dates are 12/17 and 12/19.

ASSISTANT: Richard Jones, do you need a direct flight?

USER: Yes, I need direct flight.

ASSISTANT: May I know your depart and return time for this journey?

USER: Return time should be afternoon.

ASSISTANT: Give me a moment to check with availability.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available as per your requested details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching our services.