Could anyone help me to solve the problem?

documentclass{beamer}‎‎‎
‎usetheme{Warsaw}‎
usepackage{graphicx}‎‎
usefonttheme{serif}‎
usepackage{ptext}‎
usepackage{xepersian}‎
settextfont{Yas}‎‎

begin{document}‎

section{‏پاسخ ‎hfill}‎
subsection{‌تاریخ  hfill}
subsection{آز hfill}
begin{frame}‎

end{document}