You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit the Austin live music crawl where we can find the peaceful music in AUS. Can you help me to book a flight ticket?

ASSISTANT: Sure, I can help you and can I know your preferable planned journey dates?

USER: My planned journey dates are May 02 and 04.

ASSISTANT: May I know your source airport code?

USER: My source is from Dallas & Fort Worth, DFW.

ASSISTANT: Is there any lay by in your journey?

USER: No, I prefer to travel in direct flight.

ASSISTANT: Can I know your name please?

USER: Margaret Evans here.

ASSISTANT: Sorry, there is no direct flight moving towards your location due to sold our of flight ticket.

USER: Ok, thanks for the information.

ASSISTANT: You are most welcome and thank you for reaching us.