A new name

As most of you know, as we have had our kids we have given them formal names, ie Cassandra and shorten them to cuter nick names like Cassie. Well Jessie got a trophy from soccer which has Jessica on it. She is starting ot read some and came up to me confused as to why they put somebody elses name on the trophy. So I explained the situation and she seemed to understand. I went to make a new chore chart the other day and she says "momma, can you put my real name on the chart?" I said "your real name?" She said "yeah, Jessica. and can you call me that too?" She is sticking to her request. Every time I call her Jessie she says "mom, my real name."