You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Myself Sarah Scott. I need to schedule my trip to travel this weekend. Can you please help me in reserving the ticket from AUS to LAS?

ASSISTANT: May I know your trip dates?

USER: I am planning my trip on Sept 6, and again I will return back on Sept 8.

ASSISTANT: Is there any class preferences for you?

USER: I am comfort with any class.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I am planning to travel with single connection.

ASSISTANT: Please share if you want to travel in any specific time?

USER: My depart time is evening.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Not a big problem, anyhow thank you very much for your service.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.