You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name, Please?

USER: I'm James Mitchell.

ASSISTANT: How may I help you for the day?

USER: I want to attend food festival at Austin. Can you please book a ticket within a price of 500?

ASSISTANT: Sure. May I know your airport codes, Please?

USER: My origin is Denver, CO - DEN and destination is TX - AUS.

ASSISTANT: May I know your travel dates, Please?

USER: I need to depart on 02/19 and return on 02/21.

ASSISTANT: May I know your connections limit restriction?

USER: I need one connection.

ASSISTANT: Thanks for providing valuable information. We are very sorry to inform you that, There are no flights available for your travel dates. Thank you, For making an inquiry with us regarding ticket booking. Have a wonderful day.

USER: Ok, no problem. I will found another option. Thanks for your support.

ASSISTANT: Thank you, For using our services.