you can do like this if you use popular flutter library getx

getx link

void showAlertDialogg(
    String body,
    String? confirmButtonText,
    String? cancelButtonText,
    Function(bool onConfirm, bool onCancel) clickEvent,
    {barrierDismissible = false}) {
  Get.dialog(
    Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        TextComponent(
          body,
          textAlign: TextAlign.center,
          fontSize: textSmallFontSize,
          fontWeight: titleFontWeight,
          color: Colors.white,
        ),
        Row(
          //crossAxisAlignment : CrossAxisAlignment.center,
          children: [
            Expanded(
              flex: 1,
              child: OutlineButtonComponent(
                text: cancelButtonText,
                borderColor: kPrimaryColor,
                onPressed: () {
                  Get.back();
                  clickEvent(false, true);
                },
                textColor: kPrimaryColor,
                padding: EdgeInsets.fromLTRB(16, 16, 8, 16),
              ),
            ),
            Expanded(
              flex: 1,
              child: ButtonComponent(
                text: confirmButtonText,
                buttonColor: kPrimaryColor,
                onPressed: () {
                  Get.back();
                  clickEvent(true, false);
                },
                textColor: Colors.white,
                padding: EdgeInsets.fromLTRB(8, 16,16, 16),
              ),
            ),
          ],
        )
      ],
    ),
    barrierColor: Colors.black12.withOpacity(0.8),
    useSafeArea: true
  );
}

you can pas params as you want & call this method where you need it. it supports widget so you can setup the widget as you want.