This will allow you to get a feel of what he or she is like and then you make a better judgement on whether he/she is suitable for you.
For example, if you are passionate about a certain sport, ask if he plays it.
If he/she too is passionate about this same sport, then you might probably want to get his or her number.
Secondly, find out what kind of (black Asian) relationship he wants and voice out what you are looking for.
Instead, take in the broad strokes — does he live in the same city?