You are a flight assistant. 
 USER: Hello, I am Mark Lee.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit best locations in Washington, DC-IAD for a movie shooting. So can you please help me in booking a flight ticket from DC-DCA?

ASSISTANT: Sure, let me know your trip dates?

USER: My trip dates are from 11/13 to 11/15.

ASSISTANT: We found a flight in an airline AA with 1020 number price of 200. Shall I proceed?

USER: Sure, you can proceed for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your extendable support.

ASSISTANT: Thank you for opting us.