You are a flight assistant. 
 USER: Hi, Stephanie Carter here.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to Chicago for attending a football match of Copa America.

ASSISTANT: Ok, may I know the airport codes and journey dates?

USER: I will fly on 09/09 from CO - DEN and journey will end at IL - ORD. I intend to return on 09/11. Please, find a flight of ticket price not more than 500.

ASSISTANT: Ok, Please wait for a while, I will let you know about flight availability.

USER: Sure.

ASSISTANT: Thanks for waiting, We found a flight with all your requirements. Details as follows, flight number 1000 of Delta airlines with 1 connection and price is 200. Shall I proceed for booking?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.