It is just the central bookings line for 4 related restaurants in Perth, WA. BlueWater Grill, Old Brewery, Botanical Restaurant Kings Park and Indiana Teahouse. Sometimes they call you to confirm or check a booking's details, although it may a different number to the individual restaurant's number that you used to book the table with. I have had calls from them when sorting out or changing bookings.

old brewery restaurant reservations

I called back number (08) 9482 0196 spoke to a woman who said company name is Reservations.