Tell your interviewers about your positive attributes related to the job. That you are punctual, ambitious (means you can meet targets), a good team player, have good conversation skills etcetra. As far as your weaknesses are concerned, try to keep them work related. In fact, it is a good idea to point out a couple of weaknesses that the interviewer might see as strengths, saying something like, “I am a perfectionist” or “I don’t rest till I have completed a job I started”, are good weaknesses.