You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I be your helping hand?

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 help you. May I know when you want to travel?

USER: I want to travel on 03/23 and return on 03/25.

ASSISTANT: Could you please help me by providing your airport codes?

USER: Sure, Destination is to Chicago, IL - ORD. Boarding point is from Austin, TX - AUS.

ASSISTANT: Thank you for the details. Please be on hold.

USER: Sure.

ASSISTANT: Thank you for being patience. Sorry to say, I found no flights were available on your scheduled dates.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: I am Justin Brown.

ASSISTANT: Thank you for choosing us. Have a great day.

USER: Thanks for the information.