Geneva is 7 hours ahead of Dallas
Best overlap: 8:00 AM to 11:00 AM in Dallas is 3:00 PM to 6:00 PM in Geneva.
For a call that suits both sides, look at 8:00 AM to 11:00 AM in Dallas / 3:00 PM to 6:00 PM in Geneva. With 3 hours of overlap, 8:00 AM in Dallas (3:00 PM in Geneva) is a comfortable, repeatable slot for both sides.