The quote environment is defined in the LaTeX kernel, so it's quite unlikely that a conference template disallows its usage.
I propose three solutions; each one is implemented as an environment as it should.
Note that \\ should never be used for ending paragraphs and must never precede a blank line. If you want to “leave vertical blank space” use the proper methods with \vspace or \addvspace.
\documentclass{article}
\usepackage{courier}
\newenvironment{ttquote}
{\quote\ttfamily\raggedright}
{\endquote}
\newenvironment{ttquotejustify}
{\par\addvspace{\topsep}%
\ttfamily\setlength{\spaceskip}{0.3em plus 0.3em}%
\noindent\ignorespaces}
{\par\addvspace{\topsep}\ignorespacesafterend}
\newenvironment{ttquotesmall}
{\quote\ttfamily\raggedright\small}
{\endquote}
\begin{document}
\section{Introduction}
RE is a task of extracting relations among lexical components in natural language
text. This paper focuses on extracting binary relations between two entities in a
sentence. The following is an example Wikipedia sentence with two named-entities
annotated:
\begin{ttquote}
"Knockin' on Heaven's Door" is a song written and sung by Bob Dylan,
for the soundtrack of the 1973 film Pat Garrett and Billy the Kid.
\end{ttquote}
In the example sentence above, \textit{Knockin' on Heaven's Door} and
\textit{Bob Dylan} are annotated as named-entities. Then two DBpedia properties,
\textit{dbo:composer} (from e1 to e2) and \textit{dbo:musicBy} (from e1 to e2),
can be extracted as relations between the entity pair.
\begin{ttquotejustify}
"Knockin' on Heaven's Door" is a song written and sung by Bob Dylan,
for the soundtrack of the 1973 film Pat Garrett and Billy the Kid.
\end{ttquotejustify}
In the example sentence above, \textit{Knockin' on Heaven's Door} and
\textit{Bob Dylan} are annotated as named-entities. Then two DBpedia properties,
\textit{dbo:composer} (from e1 to e2) and \textit{dbo:musicBy} (from e1 to e2),
can be extracted as relations between the entity pair.
\begin{ttquotesmall}
"Knockin' on Heaven's Door" is a song written and sung by Bob Dylan,
for the soundtrack of the 1973 film Pat Garrett and Billy the Kid.
\end{ttquotesmall}
In the example sentence above, \textit{Knockin' on Heaven's Door} and
\textit{Bob Dylan} are annotated as named-entities. Then two DBpedia properties,
\textit{dbo:composer} (from e1 to e2) and \textit{dbo:musicBy} (from e1 to e2),
can be extracted as relations between the entity pair.
\end{document}
The third solution uses \small so the text becomes less prominent; it is already emphasized by being typeset with reduced margins and a monospaced font. If you prefer it, but also want justification, in the definition change \raggedright into \setlength{\spaceskip}{0.3em plus 0.3em}.
The second solution shows how to define your own environment, should quote be disallowed. Mixing the three approaches is of course possible.

Added for svproc
Here's a definition for ttquote that indents on both sides and justifies the text.
\documentclass{svproc}
\usepackage{courier}
\newenvironment{ttquote}
{\list{}{\rightmargin=\leftmargin\rightskip=0pt}%
\ttfamily\setlength\spaceskip{0.3em plus 0.3em}%
\item\relax}
{\endlist}
\begin{document}
\section{Introduction}
RE is a task of extracting relations among lexical components in natural language
text. This paper focuses on extracting binary relations between two entities in a
sentence. The following is an example Wikipedia sentence with two named-entities
annotated:
\begin{ttquote}
"Knockin' on Heaven's Door" is a song written and sung by Bob Dylan,
for the soundtrack of the 1973 film Pat Garrett and Billy the Kid.
\end{ttquote}
In the example sentence above, \textit{Knockin' on Heaven's Door} and
\textit{Bob Dylan} are annotated as named-entities. Then two DBpedia properties,
\textit{dbo:composer} (from e1 to e2) and \textit{dbo:musicBy} (from e1 to e2),
can be extracted as relations between the entity pair.
\end{document}

\documentclass{...}, the required\usepackage's,\begin{document}, and\end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. – jjdb May 12 '17 at 11:09microtypemay help, however. – cfr May 12 '17 at 11:10\documentclass{...}missing. Have you checked the link above provided by samcarter? – jjdb May 12 '17 at 11:21