documentclass{article}
usepackage{authblk}
author[1]{. Author}
author[2]{B. Author}
author[1]{C.  Author}
%author[2]{Corresponding Authorthanks{email@2nduniversity.com}}
affil[1,2]{Institution of the Authors from  University}
affil[3]{Institution of the Authors from  College}
affil[1]{Email id: aa@gmail.com}
affil[2]{Email id: ba@gmail.com}
affil[1,3]{Email id: ca@gmail.com}
title{Title of the Presentation}
date{}
%
begin{document}
maketitle
Main Part of document here.
end{document}.