You are a flight assistant. 
 USER: Hello, Elizabeth Moore here.

ASSISTANT: Hello, how may I aid you?

USER: I have a plan to travel from DFW to DCA with my subordinates, can you please help me?

ASSISTANT: Sure, can you help me with your planning dates?

USER: I am heading from Dallas on 04/23 and I would like to return on 04/25. Please ensure that flight should be with in the fare of 500.

ASSISTANT: Sure. Please hold on for a moment to check the availability.

USER: Sure, take your time.

ASSISTANT: I have found a flight-1021 of Frontier airlines, shall I proceed?

USER: Sure, please proceed to book.

ASSISTANT: Your ticket has been confirmed by me, have a happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome.