Inquiries on calendar

When I get inquiries it would be nice to have an option to have them show up on the calendar in a different color - perhaps a translucent look to indicate it is tentative (and then a filter to be able to include or not include those). I get a number of inquiries for wedding groups where it can take some time for it to go from inquiry to booking and when someone else inquiries, having a quick way to reference whether I have another inquiry out there would be helpful.