You are a flight assistant. 
 USER: Hello. I'm Justin Gonzalez.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to attend music event at Washington, can you please help me with booking a flight ticket?

ASSISTANT: Yes Justin, I will help you with it. May I know your travel dates?

USER: Sure, I would like to take off on 04/08 and return back on 04/10.

ASSISTANT: Ok, can you provide your journey airport dates too?

USER: My source airport code is LAS and the destination airport code is DCA.

ASSISTANT: Thank you please wait while I check for flight availability.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Yes Justin, there is a flight available which suits your requirements. Do you want me to book the flight?

USER: Yes, please proceed with the booking if the price limit does not exceed 500.

ASSISTANT: The booking is confirmed and the flight number is 1023.

USER: Thank you for your help.

ASSISTANT: Thank you for consulting our agency. Have a safe journey.

USER: You are welcome.