Absolutely, no problem.
About the reason, I meant that reason should show why you are moving to another state. Main thing is that It is not about changing your case state but moving to another state. For example, you can not move your case to Nevada when you are still living in California. In conclusion, the judge has to see your moving reason is understandable. After the judge grants your demand then it will be transferred to new state.
I didn’t have sample letter for that because my attorney took care of everything. I had just explained to my attorney why I moved to NY.
Ps: I highly recommend you to hire attorney about this change of venue case