Azulx,What should this be? How do you approach this without potentially turning him/her off?
Trust yourself and your art. Do not worry about turning him or her off...or on. Just train and let your art do the selling. If they are a good fit great, if not that is ok too. Lots of martial paths in the world and perhaps this is just not the right time or place for you and the student to travel together.
If there are safety issues (such as doing throws and take downs) help them explore falling safely. Then just let them train. The process of training will provide them questions and so just be there to answer the questions that they ask.
Good luck
Regards
Brian King