voice caller id

I have a Panasonic telephone Model Number KX-TGA641 that runs on Xfinity voice services.  When I place a call to another phone number it announces my husband’s name (Russ Pittenger).   However, my husband has since passed away and I would like to know how to change the “announced name” to be mine (Natalie Pittenger).  

Thank you,  Natalie Pittenger