1) Biological evolution by natural selection tends to work very gradually, very slowly - especially for us slow reproducing hominins. You'd need to go back at the very least 300,000 years to see any noticeable change - and up to two million years (2,000,000) years ago to see significant adaptations in our morphology. Is your friend expecting to see it in their lifetime? Doesn't work like that.
2) Having said that, examples of recent evolution over the past several millenia can be found. The classic example being the gene that switches off lactose tolerance in adolescence. A mutation has occurred that does not switch off the tolerance, in populations that have a history of cattle and other livestock farming, allowing them to benefit from dairy produce that otherwise made them sick. Alternatively, many local divergences in the human gene pool over the past 10,000 - 100,000 years, as a result of semi-isolation, have produced a range of localised phenotypes that we know as 'races'.
3) Are we still evolving? A lot of people debate that one. Some argue that we've released ourselves from the forces of natural selection, as a result of greatly reduced child mortality rates, improved social welfare, healthcare, food production, etc. However, that does not apply to every population, and has occurred very recently over the past 150 years. Hardly time for us to announce the end of human evolution. In addition, sexual selection can still produce an effect, and we are now on the brink of adding our own genetic engineering to replace natural selection in the fight against degenerative and hereditary illnesses.