You can take the opportunity to speak about your positive personal traits, like dynamism, dedication and attention to details if you think these are important for the position.
You can also briefly analyze the relevancy of your experience with the position you applied for. What special aspects of your background (and accomplishments) have prepared you for this job? What experience do you bring to the table?
Try to be humble. You may start your speech by stating that you are sure others may bring wonderful skills, but what separate you are these traits and accomplishments mentioned above.
Before going to any job interview, you should rehearse the interview either with a friend or even a mirror, and keep in mind such key questions like why are you a good candidate for this job.