Hi Claudiocrs,
I think some companies would like to recruit newly graduates.
(1) Though you might not have related job experience, still I think you can tell them the why they would like to hire you, such as the points as below :
- You had related experence from your part-time job
- You are a go-getter;
- You are dynamic;
- You are a team player;
- You are a quick-learner.
- You are a straight A student
Of course, those are just my suggestions. You should write according to your own situation.
(2) Why are you interested in their company?
(3) Since they are not recruiting, you might tell them why you write to them. If I were the personnel manager, I would feel abrupt to hear from your application. Thus, you might ask them whether there's an opening in their company. If no, you hope your resume would be kept in their database of human resources. In case there's a suitable position for you in the future, you will be happy to be contacted.