I'm sorry but to change that just for you (this is the first time we have had this request) would require a level of customization of the code that would simply not be possible nor fair to ask of our coder, Robert. I'm sorry that you feel that term is offensive but at the same time it is a pretty standard way that many of us greet one another, such as "hey! how are you?!"
There is a simple way to do what anastasia requests: change the caption to "Hey (clarification: "hey" is not valid for anastasia33) , <username>, you have ....".
If she is insulted by "Hey" do what she needs.