You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Virginia Martinez. I need a reservation to visit beautiful places in Washington. Can you please book a ticket with a price range of 500?

ASSISTANT: Sure, please provide your journey dates.

USER: I want to depart on 03/28 and return on 03/30.

ASSISTANT: May I know your airport codes?

USER: I need one connection. I would like to start from Denver, CO - DEN and return from DC - IAD.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. I found a Southwest airline, Flight number: 1017, price: 100 with one connection.

USER: You can proceed with booking.

ASSISTANT: Shall I proceed with this booking? Ok, your flight ticket has been confirmed. Thanks for choosing us.

USER: Thank you for your information.