\documentclass[10pt]{article}
\usepackage[amssymb]{SIunits}
\usepackage{amsmath}
\usepackage{fullpage}
\usepackage{graphicx}

%<<
\title{Title of your talk}
\author{Author 1, University of A \and Author 2, University of B  \and Author 3, University of C}
%>>

\begin{document}
\maketitle
\begin{abstract}
 %<<
	Insert your abstract here. Please keep it less than 400 words. You can use math in your abstract like: $\frac em=c^2$, and units like: $\unit{5}{\micro \watt \cdot \meter \per \second^2}$.
 %>>
\end{abstract}

\vspace{20mm}
\noindent\textbf{Please make sure to submit your abstract before \underline{May 22nd, 2021}.}
\begin{enumerate}
\item \textbf{Please fill out the title, authors, affiliations, and abstract above.}
\item \textbf{Please remove the line that is \textit{not} relevant to you:}
\begin{itemize}
  %<< leave the option you prefer...
  \item I would like to give an oral presentation.
  \item I would like to present a poster.
   %>>
\end{itemize}
\item \textbf{Please provide your institutional e-mail address:}
\begin{itemize}
  %<<
  \item \texttt{myemail@myinstitution.com}
  %>>
\end{itemize}
\item \textbf{Please indicate the speaker in case the first author is not the speaker:}
\begin{itemize}
  %<<
  \item The first author will be the speaker.
  %>>
\end{itemize}
\item \textbf{Please rename the \TeX \ file to your last name and initials and e-mail the \underline{\TeX \ file} of this abstract to \texttt{ictw2021@gmail.com}, we will send you a receive-notice as soon as possible. Please make sure that you receive such a notice!}
\end{enumerate}
\vspace{10mm}
\textbf{If you have any questions please e-mail us at \texttt{ictw2021@gmail.com}.}

\end{document}