Code Clean-Up: Delete "False" worksheet created when "Cancel" is chosen in Input Box

I would add

Sheets("False").Delete

before your End Sub line.
The

Application.DisplayAlerts = False

should be just after the Sub Title or variable declarations (Dim As)
The

Application.DisplayAlerts = True

should be added just after the sheets delete line and before End Sub.
The Application.DisplayAlerts True/False lines are optional. When you delete a sheet in excel you will get a message asking if you are sure you want to delete the sheet(s). The display alerts = false keeps this from happening.