Tax Exemption on Self Occupied 2 Houses

I currently have a Self Occupied House in the city in which I reside as well as rented a small portion of it.

I am planning to buy a House in a town and my sister is planning to move to this house after the purchase is done.  I am not planning to rent it out as my sister is going to stay in this house completely.

How should I show in my ITR (both as Self Occupied) and whether any Tax to be shown as "Rental Income" in  the new house even though it is going to be occupied by my sister and no rent is expected?  Please clarify.