We claim the ornamental design for a display booth, as shown and described.
FIG. 1 is a front perspective view of a display booth showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a front perspective view thereof, shown in a usage condition; and,
FIG. 9 is a front perspective view thereof, shown in a second usage condition.
The broken lines are shown for the purpose of illustrating unclaimed portions of the display booth and unclaimed environmental structure and form no part of the claimed design.