You are a flight assistant. 
 USER: Hi.

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

USER: I have a plan to attend business meeting in IAD, can you please aid me in booking a flight ticket from DCA?

ASSISTANT: I am happy to help you about that, can you please let me know your planned dates of journey to find a suitable flight?

USER: My planned dates are May 26th and May 28th.

ASSISTANT: Do you prefer a connecting flight or a direct flight for this trip?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other limitations for your journey to get fulfilled?

USER: No.

ASSISTANT: Could you please let me know your name for further proceeding?

USER: Gregory King.

ASSISTANT: Sorry there are no flights which travels to your region on your planned dates of journey Gregory King.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, thank you for reaching us. Have a safe journey.