docs(adk): align quickstart script with other orchestrations

This brings the ADK Python quickstart sample up to par with the other orchestrations (like Langchain), removing the need for special test handling.

docs/en/getting-started/quickstart/python/adk/quickstart.py

@@ -1,6 +1,27 @@
+import asyncio
+
 from google.adk import Agent
 from google.adk.apps import App
+from google.adk.runners import InMemoryRunner
 from google.adk.tools.toolbox_toolset import ToolboxToolset
+from google.genai.types import Content, Part
+
+prompt = """
+  You're a helpful hotel assistant. You handle hotel searching, booking and
+  cancellations. When the user searches for a hotel, mention it's name, id,
+  location and price tier. Always mention hotel ids while performing any
+  searches. This is very important for any operations. For any bookings or
+  cancellations, please provide the appropriate confirmation. Be sure to
+  update checkin or checkout dates if mentioned by the user.
+  Don't ask for confirmations from the user.
+"""
+
+queries = [
+    "Find hotels in Basel with Basel in its name.",
+    "Can you book the Hilton Basel for me?",
+    "Oh wait, this is too expensive. Please cancel it and book the Hyatt Regency instead.",
+    "My check in dates would be from April 10, 2024 to April 19, 2024.",
+]
 
 # TODO(developer): update the TOOLBOX_URL to your toolbox endpoint
 toolset = ToolboxToolset(
@@ -8,10 +29,27 @@ toolset = ToolboxToolset(
 )
 
 root_agent = Agent(
-    name='root_agent',
+    name='hotel_assistant',
     model='gemini-2.5-flash',
-    instruction="You are a helpful AI assistant designed to provide accurate and useful information.",
+    instruction=prompt,
     tools=[toolset],
 )
 
 app = App(root_agent=root_agent, name="my_agent")
+
+async def main():
+    runner = InMemoryRunner(agent=root_agent, app=app)
+    session = await runner.session_service.create_session(
+        app_name=app.name, user_id="test_user"
+    )
+
+    for query in queries:
+        print(f"\nUser: {query}")
+        user_message = Content(parts=[Part.from_text(text=query)])
+        
+        async for event in runner.run_async(session_id=session.id, new_message=user_message):
+            if event.is_final_response():
+                print(f"Agent: {event.content.parts[0].text}")
+
+if __name__ == "__main__":
+    asyncio.run(main())