You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, In what way can I support you?

USER: Please help me to book a flight ticket from LAX to AUS.

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are from Dec, 10 to Dec, 12.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: By what name should I reserve the flight ticket?

USER: My name is Kathleen Carter.

ASSISTANT: Thank you for your details, currently no flights are available due to the busy schedule.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.

USER: Most Welcome.