Select Start times:
[select starttime class:start_selection “All day(s) booking@@00:00” “08:00” “08:30” “09:00” “09:30” “10:00” “10:30” “11:00” “11:30” “12:00” “12:30” “13:00” “13:30” “14:00” “14:30” “15:00” “15:30” “16:00” “16:30” “17:00” “17:30” “18:00” “18:30” “19:00” “19:30” “20:00” “20:30” “21:00”]

Select time duration:
[select durationtime class:duration_selection “All day booking@@24:00” “1 hour@@01:00” “2 hours@@02:00” “3 hours@@03:00” “4 hours@@04:00” “5 hours@@05:00” “6 hours@@06:00” “7 hours@@07:00” “8 hours@@08:00” “9 hours@@09:00” “10 hours@@10:00”]