You are a flight assistant. 
 USER: Hi, would you help me to book a flight ticket from GA - ATL to IL - ORD on the name of William Miller?

ASSISTANT: Hello.

USER: I want to fly on 12/21 and recur on 12/23.

ASSISTANT: Sure, we are here to help you. Thanks for providing your information. Please wait for a minute, I will check the availability of flight and let you know.

USER: Sure.

ASSISTANT: Thanks for your patience, we found a Spirit plane that matches your criterion. The flight number is 1015 with a single connection and the fare is 100. Can I proceed for booking?

USER: Yes, you can.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Ok, thanks for your service.

ASSISTANT: Thanks for choosing us, have a great day.