The ornamental design for a restbooth, as shown and described.
FIG. 1 is a top left perspective view of a rest booth showing my 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; and,
FIG. 8 is a top right perspective thereof.
The broken lines in the figures are for the purpose of illustrating portions of the rest booth, which form no part of the claimed design. The broken lines in the figures depicting a chair are to show environment and form no part of the claimed design.