You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Amy Adams. I am planning to attend music concert at DCA, can you please help me with booking a flight ticket from ORD?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: Sure, I would like to take off on 12/08 and return on 12/10.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 is provided by AA airlines. Shall I proceed with this?

USER: Yes, please proceed with the booking.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, hope you have a great journey.