Try this. It gives you 4 input boxes put one name in each only. If you have more than 4 speakers you could run it twice or add more input boxes.
Sub Delete()
Dim arr() As Variant
Dim i As Byte
'Kilroy
Selection.Find.ClearFormatting
Selection.Find.Replacement.ClearFormatting
arr = Array(InputBox("Enter Name") & ":^p", InputBox("Enter Name") & ":^p", InputBox("Enter Name") & ":^p", InputBox("Enter Name") & ":^p")
For i = LBound(arr) To UBound(arr)
With Selection.Find
.text = arr(i)
.Replacement.text = ""
.Forward = True
.Wrap = wdFindContinue
End With
Selection.Find.Execute Replace:=wdReplaceAll
Next
End Sub