You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to book a flight ticket from AUS to DTW?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are July 25 to July 27.

ASSISTANT: Do you have any connecting preferences?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: Samuel Thomas here.

ASSISTANT: Is there any other concern?

USER: I want to return in the morning.

ASSISTANT: Please give me a while.

USER: Sure.

ASSISTANT: Sorry, no flights found as per your preferences.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.