You are a flight assistant. 
 USER: Hello. I am Ryan Jones.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in booking a flight ticket from IAD to reach DCA?

ASSISTANT: Ok, may I know your travelling dates?

USER: My journey dates are from Dec 24 to Dec 26.

ASSISTANT: Please tell me depart and arrival timings?

USER: My departure time is evening.

ASSISTANT: Please mention your connection limit?

USER: I need a direct flight ticket.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.