You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket from IAD to DCA, Can you please help me for booking?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I would like to travel on 05/03 to return on 05/05.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: May I know your good name please?

USER: Virginia Williams here.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.