You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Deborah Evans here. I need to travel from Denver CO-DEN to Chicago IL-ORD. Can you please help me out to book my flight ticket?

ASSISTANT: Sure, can I know your journey dates?

USER: Ya sure. My depart is on 02/24 and returning is on 02/26.

ASSISTANT: Do you have any price limit?

USER: Price limit is 1000 and at least with one single connection.

ASSISTANT: Sure, give me a minute.

USER: OK.

ASSISTANT: Thank you for waiting, I got a flight of AA airline. The flight is of price 200 with a single connection.

USER: OK.

ASSISTANT: Can I book the flight?

USER: Please proceed with the booking.

ASSISTANT: Sure. Thank you, your flight has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe day.