You will need to set an entry on Call Rerouting First Alternatives to be to 1200, then an entry on Call Rerouting Second Alternatives to be to 1208.
Then in the Call Rerouting Form go to her extension and put the number you set for the First Alternative in that column, and then the number for the Second Alternative in that respective column.
In general do not change the First and Second Alternative destination for row "1" (basically keeping Call Rerouting First Alternative "1" and Second Alternative "1" as "don't do anything special")