You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Justin Edwards.

ASSISTANT: Justin, how may I help you?

USER: I am planning to attend music concert at JFK, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, please share your itinerary dates.

USER: Sure, I would like to take off on 07/21 and return back on 07/23.

ASSISTANT: Please give me a moment to check for a best flight on your route.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: UA airlines with flight 1012 is available as per your requirements.

USER: Yes, please proceed with the booking.

ASSISTANT: Edwards, your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.