Unknown Interview

Someone gave me a call to ask me to go for some interview. I asked where they got my number from and this person told me is from some job website. Ok,I thought will be some engineering job but he told me to wear something nice and thats all no need to bring resume and related. I asked more about it this job and the person told me that it will be some parttime job because the company is having there expanding. So I thought ok, since is parttime meaning I still got time to wait for Walta Tech.