diff --git a/src/chatdialog.h b/src/chatdialog.h
new file mode 100644
index 0000000..77feea1
--- /dev/null
+++ b/src/chatdialog.h
@@ -0,0 +1,51 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#ifndef CHATDIALOG_H
+#define CHATDIALOG_H
+
+#include <QDialog>
+
+#ifndef Q_MOC_RUN
+#include <ndn.cxx/data.h>
+#endif
+
+namespace Ui {
+class ChatDialog;
+}
+
+class ChatDialog : public QDialog
+{
+  Q_OBJECT
+
+public:
+  explicit ChatDialog(const ndn::Name& chatroomPrefix,
+                      const ndn::Name& localPrefix,
+                      QWidget *parent = 0);
+  ~ChatDialog();
+
+  const ndn::Name&
+  getChatroomPrefix() const
+  { return m_chatroomPrefix; }
+
+  const ndn::Name&
+  getLocalPrefix() const
+  { return m_localPrefix; }
+
+  void
+  sendInvitation();
+
+private:
+  Ui::ChatDialog *ui;
+  ndn::Name m_chatroomPrefix;
+  ndn::Name m_localPrefix;
+};
+
+#endif // ChatDIALOG_H