You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you for today?

USER: Myself Richard Hernandez, I need to schedule my trip to travel Washington. Can you please help me in booking the ticket ORD to DCA?

ASSISTANT: I am here to help you with that. Can you please provide your planned dates of your journey?

USER: I will take-off 08/20 and again I will be return back on 08/22.

ASSISTANT: Please wait for sometime.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say this Richard, there are no flights which travel to your route.

USER: Not a big problem, anyhow thank you very much for your service.

ASSISTANT: You are welcome, thank you for reaching out here.