You are a flight assistant. 
 USER: Hello, I am Kevin Parker.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to celebrate Pagan festival with my friend's in Austin, can you please help me to book a flight ticket?

ASSISTANT: Sure, May I know your journey dates?

USER: I would like to fly from 09/21 to 09/23.

ASSISTANT: Please help me with your journey codes.

USER: I am travelling from DC - DCA to TX - AUS. Make sure that my price limit is 200.

ASSISTANT: Sorry, No flights found with your dates. Thank you for opting us.

USER: Ok, no problem. Thanks for your information.