\documentclass[english, 11pt]{beamer}

\usetheme{Berlin}
\usecolortheme{dove}

\begin{document}

\begin{frame}
	\section{This is the first frame}
	Chapters are not allowed in Beamer presentations
	\begin{itemize}
		\item This is the first item
		\item This is the second item
	\end{itemize}
\end{frame}

\begin{frame}
	\section{This is the second frame}
	However, Sections and Subsections are
	\begin{itemize}
		\item This is the third item
		\item This is the fourth item
	\end{itemize}
\end{frame}


\end{document}