The ornamental design for a telephonebooth, as shown and described.
FIG. 1 is an enlarged perspective view of a telephone booth of the inset 1 of FIG. 2, showing our new design;
FIG. 2 is a perspective view thereof;
FIG. 3 is another perspective view thereof, from a different angle than FIG. 2;
FIG. 4 is a front view thereof;
FIG. 5 is a left side view thereof; and,
FIG. 6 is a top view thereof.
The broken lines shown in the drawings of the telephone booth are for the purpose of illustrating the environment and form no part of the claimed design. The black bands in FIGS. 1, 2 and 4 depict frame structure for the sides of the telephone booth depicted therein.