From Chicago White Sox media relations.
Here is the ticket information for people who had tickets to the two postponed games.
If people are holding tickets for the game on 4/19 vs. Minnesota, those tickets are good for game one of the split doubleheader on Friday, 8/9 vs. the Twins (1:10 p.m. CT). These tickets are good for the 8/9 game (1:10 p.m.) only and not redeemable for another game.
If people are holding tickets for 4/23 game vs. Cleveland, those tickets are essentially a gift certificate and can be used for any future regular season game on a ticket for ticket basis.