You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Myself Donald Evans. I would like to take my wife at Minneapolis river walk in this holidays, can you book me a ticket from IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned dates are 06/18 and 06/20.

ASSISTANT: What is your destination airport code?

USER: I want to land at MSP.

ASSISTANT: Do you need any other specifications?

USER: Yes, my budget is 500. I need a lay by in between my journey.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: There is a flight found with AA airline of flight number 1015 and fare is 200. Shall I proceed for booking?

USER: Yes, you can proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thanks for contacting us, have a nice journey.