\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
%=======================================================================
%% Uncomment at most one of the babel commands below                  %%
%%--------------------------------------------------------------------%%
\usepackage[english]{babel}
%\usepackage[british]{babel}
%\usepackage[portuguese]{babel}
%\usepackage[spanish]{babel}
%=====================================
\usepackage[utf8]{inputenc}
\usepackage[dvipsnames]{xcolor}
\usepackage{hyperref}
\hypersetup{colorlinks,linkcolor = {red!60!black},citecolor = {green!60!black},urlcolor = {blue!60!black}}
%=====================================

\usepackage{amssymb}
\usepackage{amsmath,amssymb,amsfonts}






%=====================================
\begin{document}
\pagestyle{empty}
%=====================================
\begin{center}

{\Large\bf Your title here }\\[0.2in]

{
\large
%
Author 1 $^{1,*}$\hspace{.2cm}
%
%IMPORTANT: the asterisk * indicates the author who will present the work.
%
Author 2 $^2$\hspace{.2cm}
%
}

%
$^1$ Affiliation of author 1\\
%
$^2$ Affiliation of author 2\\
%

\end{center}
%=======================================
\par\noindent\rule{\textwidth}{0.4pt}
{\it Keywords: kw1; kw2; ...; kw5}
\par\noindent\rule[7pt]{\textwidth}{0.4pt}
%==========================================

Here goes the abstract.  The complete abstract must be at most 2 pages long. 





%=========================================
\end{document}
