2010 chrysler town and country transmission fluid type

I have 2010 town& Country when do you change transmission fluid and how oftenOne person is telling me that a simple fluid and filter change is sufficient even though only half the fluid is changed..Another person is telling me that a complete flush is better although the filter is not changed.What is your

I think I am  due for a transmission servicing as I have 60,000 KMS on the odometer.
One person is telling me that a fluid and filter change is sufficient even though on one half of the fluid is really changed

Another person is telling me that a full flush and fluid change should be done even though the filter is not changed.

Which is the proper method in you opinion

Thanks

Wayne Bohnet