For a reading, I would wear a pretty but modest (not too short, not too low cut) dress in a color or pattern that flatters my complexion with a nice cardigan (or jacket if you insist) belted with a skinny belt. (corporette.com)
«Versatile dress It can be casual chic if you accessorize with jewlery and add a nice cardigan or shrug. (chadwicks.com)