You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jerry Jones. I am planning to book a ticket to attend a music event at Austin. Can you please help me out to book a flight ticket for me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please share your preferred travel dates.

USER: I would like to travel on 08/23 and return back on 08/25.

ASSISTANT: Can I know your desired airport codes please?

USER: My nearest source code is DTW and my destination airport code is AUS.

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry to say, there is no flight available on your desired travel dates.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for opting us.