You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Linda Brown, can you help me with booking ticket from ORD to AUS?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Ok, my preferable dates are from Apr 11 to 13.

ASSISTANT:  May I know your preferable journey timings?

USER: Yes, I want to departure in the evening time.

ASSISTANT: May I know your other specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.