You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Paul Hernandez. I planned to travel from AUS to ORD, can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: I prefer to travel on 06/02 and 06/04.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you and have a nice day.