Below is my attempts at basic VB

Dim lngUserChoice As Long
lngUserChoice = MsgBox("Do you want to Undo last entry?", _
vbYesNo + vbQuestion, "Undo Last Entry")
If lngUserChoice = vbYes Then
GoTo Account_undo
If Response = vbNo Then GoTo Bye
End If
End Sub

I am getting an error message Compile Error: Label Not Defined...I figure this is a basic step I am missing...I am trying to get a message button to go forward with the Macro Account_undo if yes and if no end...don't execute...

I appreciate your help.