You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER:  I want to book a flight ticket to Chicago with price under 1000. Can you help me with it?

ASSISTANT: Sure, please share me travelling dates?

USER: Travelling dates are 01/19 and 01/21.

ASSISTANT: May I know your airport codes?

USER: Airport codes are DEN-ORD.

ASSISTANT: Thanks for providing details. We found a 1016 Delta airline with single connection and price of 200. Shall I proceed with booking?

USER: Yes, you can proceed with booking.

ASSISTANT: To confirm your booking, we need your name?

USER: My name is Barbara Wilson.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.