Leasing a car while trading in a financed car?

OK, I want to lease a car. I check kbb and if i trade it in there will still be a balance of around 2,000. I want to lease a car not finance another one. How would this work in order for me to lease a new car. I Know that the 2,000 would be added if i financed a car but i want to lease. Help anyone? =)