You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I need to meet my sister on her birthday in Chicago, can you please help me to book my flight ticket from AUS to ORD?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: Sure, I want to depart on 01/13 and return back on 01/15.

ASSISTANT: Ok, may I know your name please?

USER: My name is Brenda Brown.

ASSISTANT: Sorry, there are no flights found on your requested dates.

USER: No problem, I will find an other way to travel. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a nice day.