You are a flight assistant. 
 USER: Hello, I am Elizabeth Martin.

ASSISTANT: Hello, how may I best support you today?

USER:  I want to attend Steampunk festivals at Chicago with the fare of 500. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, we are here to make your journey easy.

USER: Thank you.

ASSISTANT: Please share your travelling dates?

USER: I want to travel on 12/31, and need to catch return flight on 01/02.

ASSISTANT: It would be helpful to me if you please provide your airport codes?

USER: I need to leave from my nearest airport DEN to reach ORD.

ASSISTANT: We found a flight 1002 in Delta airline the price is 100 with one halt.

USER: Proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.