def confirm_booking_node(state: AgentState) -> dict[str, Any]:
        option = state.get("selected_slot")
        if option is None:
            raise ValueError("A slot must be selected before confirmation.")
        booking = repository.create_booking(
            option, state["booking_details"], float(state["calculated_price"])
        )
        return {
            "booking_id": booking.id,
            "status": "confirmed",
            "messages": [
                AIMessage(
                    content=(
                        f"Confirmed! Booking {booking.id} is scheduled for "
                        f"{option.start_at}. Your total is ${booking.price:.2f}."
                    )
                )
            ],
        }