Fix ended session when there isn't any response from the user (#72218)

* Fix end session when there isn't any response

This PR fixes #72153

* Added test case as requested

https://github.com/home-assistant/core/pull/72218#discussion_r881584812

tests/components/intent_script/test_init.py

@@ -38,6 +38,8 @@ async def test_intent_script(hass):
 
     assert response.speech["plain"]["speech"] == "Good morning Paulus"
 
+    assert not (response.reprompt)
+
     assert response.card["simple"]["title"] == "Hello Paulus"
     assert response.card["simple"]["content"] == "Content for Paulus"
 
@@ -85,3 +87,49 @@ async def test_intent_script_wait_response(hass):
 
     assert response.card["simple"]["title"] == "Hello Paulus"
     assert response.card["simple"]["content"] == "Content for Paulus"
+
+
+async def test_intent_script_falsy_reprompt(hass):
+    """Test intent scripts work."""
+    calls = async_mock_service(hass, "test", "service")
+
+    await async_setup_component(
+        hass,
+        "intent_script",
+        {
+            "intent_script": {
+                "HelloWorld": {
+                    "action": {
+                        "service": "test.service",
+                        "data_template": {"hello": "{{ name }}"},
+                    },
+                    "card": {
+                        "title": "Hello {{ name }}",
+                        "content": "Content for {{ name }}",
+                    },
+                    "speech": {
+                        "type": "ssml",
+                        "text": '<speak><amazon:effect name="whispered">Good morning {{ name }}</amazon:effect></speak>',
+                    },
+                    "reprompt": {"text": "{{ null }}"},
+                }
+            }
+        },
+    )
+
+    response = await intent.async_handle(
+        hass, "test", "HelloWorld", {"name": {"value": "Paulus"}}
+    )
+
+    assert len(calls) == 1
+    assert calls[0].data["hello"] == "Paulus"
+
+    assert (
+        response.speech["ssml"]["speech"]
+        == '<speak><amazon:effect name="whispered">Good morning Paulus</amazon:effect></speak>'
+    )
+
+    assert not (response.reprompt)
+
+    assert response.card["simple"]["title"] == "Hello Paulus"
+    assert response.card["simple"]["content"] == "Content for Paulus"