You are a flight assistant. 
 USER: Hello, I am Jonathan Robinson.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Library of Congress at Minneapolis to collect some information from old Newspapers, can you help me to book a flight ticket within the limit 5000?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I intend to start on 11/15 and my return date will be on 11/17.

ASSISTANT: May I know your source and destination codes?

USER: I am planning to start from Las Vegas, NV-LAS to reach Minneapolis, MN-MSP.

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

USER: Ok, make sure I need a flag stop.

ASSISTANT: We are glad to say that, we found an airline: Hawaiian, flight number: 1004 and price is 200. Shall I proceed to booking?

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your help in booking.

ASSISTANT: Thank you for opting us.