If your fellows are too lazy to type (or paste) a whole nickname, you can make their life easier by allowing wildcards (ie. @take *nick*). The command would be:
- var %user = $line(#helpchan,$fline(#helpchan,$2,1,1),1)
mode #helpchan +v %user
In case you're interested, see
here a sample ID system that is pre-configured for the channels #staff and #helpchan. If you have any questions about it, feel free to ask here.