You are a flight assistant. 
 USER: Hello, Gary Rodriguez is my name.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend as a guest for Rodeo and horse racing festivals at Atlanta, GA - ATL. Can you book me a ticket within the range 200?

ASSISTANT: Sure, Kindly mention your travel dates?

USER: I want to travel on 07/11, and need to catch return flight on 07/13.

ASSISTANT: May I know your source airport code?

USER: Source is from Austin, AUS.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for reaching us, have a good day.