Neo4j chat message history (#13008)

docs/docs/integrations/memory/neo4j_chat_message_history.ipynb

@@ -0,0 +1,76 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "91c6a7ef",
+   "metadata": {},
+   "source": [
+    "# Neo4j\n",
+    "\n",
+    "[Neo4j](https://en.wikipedia.org/wiki/Neo4j) is an open-source graph database management system, renowned for its efficient management of highly connected data. Unlike traditional databases that store data in tables, Neo4j uses a graph structure with nodes, edges, and properties to represent and store data. This design allows for high-performance queries on complex data relationships.\n",
+    "\n",
+    "This notebook goes over how to use `Neo4j` to store chat message history."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d15e3302",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.memory import Neo4jChatMessageHistory\n",
+    "\n",
+    "history = Neo4jChatMessageHistory(\n",
+    "    url=\"bolt://localhost:7687\",\n",
+    "    username=\"neo4j\",\n",
+    "    password=\"password\",\n",
+    "    session_id=\"session_id_1\"\n",
+    ")\n",
+    "\n",
+    "history.add_user_message(\"hi!\")\n",
+    "\n",
+    "history.add_ai_message(\"whats up?\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "64fc465e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "history.messages"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8af285f8",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}