Maybe something like
Sub ReplyMSG()
Dim nameExample As String
Dim testNum As Double
Dim olItem As Outlook.MailItem
Dim olInsp As Outlook.Inspector
Dim wdDoc As Object
Dim oRng As Object
Dim olReply As MailItem    ' Reply
    On Error Resume Next
    testNum = InputBox("Enter quote number", "Quote Number", 1)
    For Each olItem In Application.ActiveExplorer.Selection
        nameExample = Split(olItem.SenderName, Chr(32))(0)
        Set olReply = olItem.ReplyAll
        With olReply
            Set olInsp = .GetInspector
            Set wdDoc = olInsp.WordEditor
            Set oRng = wdDoc.Range(0, 0)
            oRng.Text = "Hi " & nameExample & vbCr & vbCr & _
                        "Please refer to this RFQ as Quote #" & testNum
        End With
        olReply.Display
        testNum = testNum + 1
        DoEvents
    Next olItem
    Set olReply = Nothing
    Set olItem = Nothing
    Set olInsp = Nothing
    Set wdDoc = Nothing
    Set oRng = Nothing
End Sub