<prompt> Human: My old landlord hasnt returned my security deposit and it is 45 days since my lease ended. He was in the process of selling the building and had been finalizing the sale with the new owner when my lease was up. He hasnt responded to any of my emails and Im not sure what to do. Can anyone offer advice on a similar situation? Im in the suburbs of Chicago if that helps.  <response>: Small claims court? 