Trying to Call An Api on Success will get the Data, But on Failure it Dismisses the Dialog and Displays Blank Plage

How To Call The Api Service Again on failure to Display the data, On Failure Will get A Blank Screen after the Progress Dialog Ends.

public void setSemesterData() {

    progressDialog=new ProgressDialog(context, R.style.MyAlertDialogStyle);
    progressDialog.setMessage("Loading..Please Wait");
    progressDialog.setIndeterminate(false);
    progressDialog.setCancelable(false);
    progressDialog.show();
    apiService= RetroClient.getApiService();
    Call<SemesterModel> call=apiService.getSemester(id);
    call.enqueue(new Callback<SemesterModel>() {
        @Override
        public void onResponse(Call<SemesterModel> call, Response<SemesterModel> response) {
            progressDialog.dismiss();


            if(response.isSuccessful())
            {

                semesterList.clear();
                semesterList.addAll(response.body().getData());
                semesterAdapter.notifyDataSetChanged();
            }
        }

        @Override
        public void onFailure(Call<SemesterModel> call, Throwable f) {
            progressDialog.dismiss();
        }
    });

}