You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Ok, may I know your trip dates?

USER: My travel dates are from Dec 05 to Dec 07.

ASSISTANT: May I know your name?

USER: I am Debra Hill.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Flight-1012 is available for you with 1 connection by Spirit Airlines. Can I book it?

USER: I would like to depart in the afternoon, can you please check with it?

ASSISTANT: Sorry to say, there are no flights available for you with depart time in afternoon.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.