You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Please help me in booking flight ticket from DCA to IAD to attend an event.

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Please share me your planned journey dates?

USER: My trip dates are Jan 21 to Jan 23.

ASSISTANT: Do you want a connecting flight for your journey?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirement?

USER: My return should be in the afternoon.

ASSISTANT: May I know your good name?

USER: James Rodriguez.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.