diff --git a/src/invitation-request-dialog.cpp b/src/invitation-request-dialog.cpp
new file mode 100644
index 0000000..47b63f1
--- /dev/null
+++ b/src/invitation-request-dialog.cpp
@@ -0,0 +1,71 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Qiuhan Ding <qiuhanding@cs.ucla.edu>
+ *         Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#include "invitation-request-dialog.hpp"
+#include "ui_invitation-request-dialog.h"
+
+namespace chronochat {
+
+InvitationRequestDialog::InvitationRequestDialog(QWidget* parent)
+  : QDialog(parent)
+  , ui(new Ui::InvitationRequestDialog)
+{
+    ui->setupUi(this);
+
+    connect(ui->okButton, SIGNAL(clicked()),
+            this, SLOT(onOkClicked()));
+    connect(ui->cancelButton, SIGNAL(clicked()),
+            this, SLOT(onCancelClicked()));
+}
+
+InvitationRequestDialog::~InvitationRequestDialog()
+{
+    delete ui;
+}
+
+void
+InvitationRequestDialog::onInvitationRequestReceived(QString alias, QString chatroom,
+                                                     Name interestName)
+{
+  m_invitationInterest = interestName;
+
+  QString msg = QString("%1\n request your invitation to chatroom\n %2 ").arg(alias).arg(chatroom);
+  ui->msgLabel->setText(msg);
+
+  show();
+  raise();
+}
+
+void
+InvitationRequestDialog::onOkClicked()
+{
+  emit invitationRequestResponded(m_invitationInterest, true);
+  this->close();
+
+  ui->msgLabel->clear();
+  m_invitationInterest.clear();
+}
+
+void
+InvitationRequestDialog::onCancelClicked()
+{
+  emit invitationRequestResponded(m_invitationInterest, false);
+  this->close();
+
+  ui->msgLabel->clear();
+  m_invitationInterest.clear();
+}
+
+} // namespace chronochat
+
+#if WAF
+#include "invitation-request-dialog.moc"
+// #include "invitation-request-dialog.cpp.moc"
+#endif