Display Screen with Transitional Graphical User Interface

FIG. 1 is a front view of a display screen or portion thereof with a transitional graphical user interface showing a first image in a sequence according to the claimed design, wherein the portions of the transitional graphical user interface that contrast with the display screen or a portion thereof are indicated using a slanted line hatching pattern; FIG. 2 is a front view of a second image in the sequence; FIG. 3 is a front view of a third image in the sequence; FIG. 4 is a front view of a fourth image in the sequence; FIG. 5 is a front view of a fifth image in the sequence; and, FIG. 6 is a front view of a sixth image in the sequence. FIG. 1 to FIG. 6 are lined for color. The outermost broken-line border in each figure shows a portion of a display screen. The remaining broken lines show portions of the graphical user interface. The broken lines form no part of the claimed design. The appearance of the transitional image sequentially transitions between the images shown in FIG. 1 to FIG. 6 . The process or period in which an image transitions to another image forms no part of the claimed design.