Someone

alias tb { if (!$3) { echo -ate You have missed out a part of the trigger. /tb <nick> <time> <reason>. }
  else { /mode $chan +b $address($1,2) | kick $chan $1 Banned from $chan for $2 minutes. Reason: $3- | timer 1 $calc($2 * 60) /mode $chan -b $address($1,2) }
}