ASK [{Y[es]:N[o]}] <message>

     This condition asks the user to directly interfere with the order of
batch file processing. During processing a <message> is displayed on the
screen containing a standard answer. If it is confirmed by the user (Yes),
the condition is considered to be true, if rejected (No) - not true.

     Non-obligatory parameter {Y[es]:N[o]} sets user's default answer.  If
the answer is "yes" then pressing [Enter] is considered to be "Yes"
automatically.

     You should write your <message> so that the responder could clearly
understand the condition meaning.

Example:

 IF ASK YES "Are you sure" goto1
 exit
 :1
 .....