How to personalise 'thank you' message?

[Bluenose]

Hello

I have the following as part of my Contact.aspx.vb file:

Protected Sub SendEmail_Click(sender As Object, e As System.EventArgs)

in Visual Studio (2013):

  pnlFormFields.Visible = False
        pnlThankYouMessage.Visible = True

    End Sub

When the user completes the form fields in my Contact.aspx page which has this:

<asp:Panel ID="pnlThankYouMessage" runat="server" CssClass="panel" Visible="False">

          Thank you. Your message has been sent.

          </asp:Panel>

and presses 'Send', the 'Thank you message appears. Without redirecting the user to another page, how could I
personalise the 'Thank you' messsage, so that it says 'Thank you + personal name' (the name typed in the form's name field), please?

Thank you.