You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please assist me by book a direct flight from DCA?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My journey dates are Mar 27 and 29.

ASSISTANT: May I know your destination point?

USER: My preferred destination airport code is IAD.

ASSISTANT: Let me know your name?

USER: My name is Patricia Johnson.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, take your time.

ASSISTANT: We found Southwest airlines with direct flight and number 1029 fare of 100 with economy class, Shall I proceed for booking?

USER: Proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for approaching us.