You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I assist you ?

USER: I am Jonathan Martin, I want to book a flight ticket with a price limit of 500 to Washington.

ASSISTANT: Ok. Could you share your airport codes, please?

USER: Sure, me and my friends are planning to visit National Gallery Of Art in DC - DCA and my source from CA - LAX.

ASSISTANT: Ok. When are you planning to start from LAX?

USER: My departure is 01/08 and return date on 01/10.

ASSISTANT: Ok, thanks for sharing your journey details.

USER: Ok.

ASSISTANT: Please hold on for couple of minutes, I will revert you.

USER: Sure.

ASSISTANT: Thanks for being patient, you have a UA airline with in your price limit. Can I proceed to book?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked with flight number 1006.

USER: Thanks for your service.

ASSISTANT: Thanks for availing us, Jonathan Martin.