my itinerary begins with two segments, sea-sfo on the 20th and sfo-iad on the 22nd. i want to blow off sf, and go straight sea-iad on #916 on the 22nd. i punch ChangeItinerary. it lets me select which flight i wish to change. i manage to change the first segment, sea-sfo on the 20th, to sea-iad on the 22nd. but then what do i do with the second segment, sfo-iad? there seems to be no way to just delete a segment.