operator speech update

psGrammar/tasks/carrymyluggage/commands.jsgf

@@ -7,12 +7,10 @@ public <statement> = <command>;
 
 <command> = [<robot>] ( <followMe> | <arrived> | <goBack> ) [<robot>];
 
-<goBack> = ( go back ); 
+<goBack> = ( [thanks you can] go back [now] );
 
-<followMe> = ((follow | come with ) me [to the <place>]);
+<followMe> = [please] ((follow | come with ) me [to the <place>]);
 
 <arrived> = ((stop [(here | following me)]) | (wait here) | (we arrived [ at the <place>]) );
 
 <place> = ( car );
-
-<> = ( car );