src/frontend_service/orchestrator/langchain_tools/langchain_tools_orchestrator.py [251:275]:
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    def get_base_history(self, session: dict[str, Any]):
        if "user_info" in session:
            base_history = {
                "type": "ai",
                "data": {
                    "content": f"Welcome to Cymbal Air, {session['user_info']['name']}!  How may I assist you?"
                },
            }
            return base_history
        return BASE_HISTORY

    async def user_session_signout(self, uuid: str):
        user_session = self.get_user_session(uuid)
        if user_session:
            await user_session.close()
            del self._user_sessions[uuid]

    def close_clients(self):
        close_client_tasks = [
            asyncio.create_task(a.close()) for a in self._user_sessions.values()
        ]
        asyncio.gather(*close_client_tasks)


PREFIX = """The Cymbal Air Customer Service Assistant helps customers of Cymbal Air with their travel needs.
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src/frontend_service/orchestrator/vertexai_function_calling/function_calling_orchestrator.py [245:269]:
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    def get_base_history(self, session: dict[str, Any]):
        if "user_info" in session:
            base_history = {
                "type": "ai",
                "data": {
                    "content": f"Welcome to Cymbal Air, {session['user_info']['name']}!  How may I assist you?"
                },
            }
            return base_history
        return BASE_HISTORY

    async def user_session_signout(self, uuid: str):
        user_session = self.get_user_session(uuid)
        if user_session:
            await user_session.close()
            del self._user_sessions[uuid]

    def close_clients(self):
        close_client_tasks = [
            asyncio.create_task(a.close()) for a in self._user_sessions.values()
        ]
        asyncio.gather(*close_client_tasks)


PREFIX = """The Cymbal Air Customer Service Assistant helps customers of Cymbal Air with their travel needs.
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