You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Katherine Smith. I need to schedule my trip to travel Chicago. Can you please help me in reserving the ticket from AUS to ORD?

ASSISTANT: Sure, I am ready to help you. May I know on what dates would you like to travel?

USER: I am planning my trip on Mar 20, and again I will return back on Mar 22.

ASSISTANT: Do you have any requirements?

USER: I am comfort with direct flight.

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

USER: Not a big deal, anyway thank you very much for your service.

ASSISTANT: Thank you for choosing us.