The following should work and appears to do so with your sample

Sub Macro1()
Dim vFindText As Variant
Dim vReplaceText As Variant
Dim oRng As Range
Dim i As Integer
Dim lAsk As Long
    vFindText = Array(ChrW(61616), ChrW(61617))
    vReplaceText = Array(Chr(176), Chr(177))
    For i = 0 To UBound(vFindText)
        Set oRng = ActiveDocument.Range
        With oRng.Find
            .Text = vFindText(i)
            Do While .Execute
                oRng.Select
                lAsk = MsgBox("Replace Symbol", vbYesNoCancel)
                If lAsk = 2 Then GoTo lbl_Exit
                If lAsk = 6 Then
                    oRng.Text = vReplaceText(i)
                    oRng.Font.Name = "Times New Roman"
                End If
                oRng.Collapse 0
            Loop
        End With
    Next i
lbl_Exit:
    Exit Sub
End Sub

Sub Macro2()
Dim vFindText As Variant
Dim vReplaceText As Variant
Dim oRng As Range
Dim i As Integer
Dim lAsk As Long

    vFindText = Array(Chr(176), Chr(177))
    vReplaceText = Array(ChrW(61616), ChrW(61617))
    For i = 0 To UBound(vFindText)
        Set oRng = ActiveDocument.Range
        With oRng.Find
            .Text = vFindText(i)
            Do While .Execute
                oRng.Select
                lAsk = MsgBox("Replace Symbol", vbYesNoCancel)
                If lAsk = 2 Then GoTo lbl_Exit
                If lAsk = 6 Then
                    oRng.Text = vReplaceText(i)
                    oRng.Font.Name = "Symbol"
                End If
                oRng.Collapse 0
            Loop
        End With
    Next i
lbl_Exit:
    Exit Sub
End Sub