Test file exist in batch

@echo off
SET file=mes.log
SET filename=mes

for /f %%a in ('dir /b /a-d %file%') do (
 if %%~na==%filename% GOTO :FileFound
)
GOTO :FileNotFound

:FileFound
ECHO FILE FOUND
GOTO :BatchEnd

:FileNotFound
ECHO FILE NOT FOUND

:BatchEnd
ECHO END