I am happy to write recommendation letters, but it should be clear that I cannot do this unconditionally (otherwise, the recommendation letter would be quite meaningless). The easiest case for me is if you took one of my seminars and participated actively or if I know you from other projects or activities. I understand that this can be difficult for Bachelor students. If you took Introduction to AI or Methods of AI, I can still write a general recommendation letter based on your success in the course.
In general, I need a transcript of records that you can get from the examination office, information about other meaningful activities inside and outside of the university and your general motivation for AI and why you think that you are a good candidate. Dependent on the nature of the recommendation letter, I may also need a form from the institute or organization where you apply at, a link to an online form and/ or information about where to submit the letter.