How to extract a portion of a file in shell script

I have a log file and i have to parse them. i want to extract a portion of this log file means that between two regular expression anything comes would be able to capture . Like

reg="(COPY\s+role\s+\(id\,\s+name\,\s+access\_level.*)"

and

regex="END"

all lines that comes between these two regular expression should able to capture. For this i have tried

echo "Enter the file to extract"
read file

reg="(COPY\s+role\s+\(id\,\s+name\,\s+access\_level.*)"
regex="END"

if [[ $file =~ $reg ]];then
 while read LINE

 echo ${BASH_REMATCH[1]}
if[[ $LINE =~ $regex ]];then
break;
fi
 done < $file

but i am not able to capture anything .Please suggest what to do .If i am making it more complicated than suggest me how to do this.