You are a flight assistant. 
 USER: Hello, I am Patrick Davis.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are Sept 26 to Sept 28.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to depart and return in the afternoon.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.