Macro to return result name in column B

Hi Experts

the following vba code works 100% but i need to amend the current code so it returns the text name in column b" onwards which match the account number in column A2 onwards...

As opposed to saying MsgBox "You Entered Customer Account Number " & num & " which matches " & Range("B" & r).Value

i want the macro to say account number: XXXXXXX relates to organistion name: BNY etc...

Sub sValidate()
    
    Dim num As String, chK As Long, r As Long, e As Long
    
    num = Application.InputBox(prompt:="Enter: Customer Account Number:", Type:=1)
    
    If num = 0 Then
        MsgBox "Incorrect Customer Account Number!. Please Re-Enter Next Customer Account Number!"
        Exit Sub
    End If
    
    On Error Resume Next
    r = Sheets("Source data").Range("A2:A500000").Find(num, , , xlWhole).Row
    e = Err.Number
    On Error GoTo 0
    
    If e <> 0 Then
        MsgBox "Customer Account Number Not Found!"
        Exit Sub
    End If
    
    MsgBox "You Entered Customer Account Number " & num & " which matches " & Range("B" & r).Value
End Sub