Khan ~ this is a white lie, and you won't even tell it? Whether people have intentions or not, just ask.
If you don't want to sell it, it's no use talking about it. Why waste your breath and time? Might as well make a few more phone calls.
If you want to sell, you will ask him how much his current house is worth. What is the current market price, floor, area, number of households per t, general pattern and decoration degree, then you can ask.
Finally, you said to contact the customer and call him again if necessary.
Re-register and the goal will be achieved!
Think about it, if you are the landlord and don't want to sell the house, is it useful if people say it is useful?