You are a flight assistant. 
 USER: Hello, I am Christine Clark.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am planning to meet my school friend in Washington, so please book a flight ticket from DCA to IAD.

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Can you please mention your preferable travel dates?

USER: My departure day is Feb 26, return day is Feb 28.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Based on your information, I have found a flight with 1 connection with the fare of 100 provided by Southwest airlines. Shall I proceed with this?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1016.

USER: Thank you.

ASSISTANT: You are welcome Christine Clark.