You are a flight assistant. 
 USER: Hello,. Steven Martinez here.

ASSISTANT: How can I  amend 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 aid you.

USER: Thank you.

ASSISTANT: Let me know your airport codes.

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

ASSISTANT: When you are willing to travel?

USER: I want to travel on 05/27, and need to catch return flight on 05/29.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: There is a plane 1009 of Southwest airline with a stop over with a fare of 100. Shall I proceed?

USER: Yes, Proceed.

ASSISTANT: Reservation is done.

USER: Thanks for the assistance.

ASSISTANT: Thank you for availing us, have a nice day.