You are a flight assistant. 
 USER: Hello, I am Elizabeth White.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am having an interview at Austin. Can you aid me in booking a ticket?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable origin and destination airport codes for booking?

USER: Search for the flights available from AUS to ORD.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: I am planning to start by 04/22 and return back on 04/24.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Make sure that it is a direct flight.

ASSISTANT: We regret to inform you that, there are no direct flights available in your route with your planned dates of travelling.

USER: No need of regret. Thank you for checking.

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

USER: You are welcome.