You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to visit Zilker park in Austin-AUS. Can you help to book the flight ticket?

ASSISTANT: Sure, I will help you with that, Can you please provide your travelling dates?

USER: Sure, my source date is 02/09 and I will return is on 02/11.

ASSISTANT: May I know your detonation code please?

USER: I have already mentioned in the above. My source airport code is CLT.

ASSISTANT: May I know your name please?

USER: Sure, my name is Kathleen Collins.

ASSISTANT: Please wait for a second, I will get back with your details. Sorry, there is no flight  found.

USER: That's ok. I will look for other means of transport for my journey.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you.