You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Jonathan Turner. I want to travel ORD for my film shooting purpose, can you please book a flight ticket from AUS?

ASSISTANT: Sure, please tell me your planned travelling dates.

USER: Thanks, I want to take off from Austin on 12/03 and please book my return ticket also on 12/05.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: It's ok no problem, I will go with another airline. Thank you for your information.

ASSISTANT: Thank you.

USER: Welcome.