diff --git a/src/uipath/runtime/context.py b/src/uipath/runtime/context.py
index c77ceb0..3f34715 100644
--- a/src/uipath/runtime/context.py
+++ b/src/uipath/runtime/context.py
@@ -337,6 +337,21 @@ def with_defaults(
         for k, v in kwargs.items():
             setattr(base, k, v)
 
+        # Attempt to parse inputs for reserved keys and overlay onto context.
+        # This is used for conversational fields which can be passed in through either inputs or config fpsProperties.
+        input_override_mappings = {
+            "uipath__conversation_id": "conversation_id",
+            "uipath__exchange_id": "exchange_id",
+        }
+        try:
+            input_dict = base.get_input()
+        except UiPathRuntimeError:
+            input_dict = None
+        if isinstance(input_dict, dict):
+            for input_key, attr_name in input_override_mappings.items():
+                if input_key in input_dict and hasattr(base, attr_name):
+                    setattr(base, attr_name, input_dict[input_key])
+
         return base
 
     @classmethod
diff --git a/tests/test_context.py b/tests/test_context.py
index 9231f65..f1493e4 100644
--- a/tests/test_context.py
+++ b/tests/test_context.py
@@ -158,6 +158,109 @@ def test_parse_input_string_returns_none_for_empty_string() -> None:
     assert result is None
 
 
+def test_with_defaults_overlays_ids_from_input(tmp_path: Path) -> None:
+    ctx = UiPathRuntimeContext.with_defaults(
+        config_path=str(tmp_path / "missing.json"),
+        input=json.dumps(
+            {
+                "uipath__conversation_id": "conv-from-input",
+                "uipath__exchange_id": "exch-from-input",
+            }
+        ),
+    )
+
+    assert ctx.conversation_id == "conv-from-input"
+    assert ctx.exchange_id == "exch-from-input"
+
+
+def test_with_defaults_input_wins_over_fps(tmp_path: Path) -> None:
+    config_path = tmp_path / "uipath.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "fpsProperties": {
+                    "conversationalService.conversationId": "conv-from-fps",
+                    "conversationalService.exchangeId": "exch-from-fps",
+                }
+            }
+        )
+    )
+
+    ctx = UiPathRuntimeContext.with_defaults(
+        config_path=str(config_path),
+        input=json.dumps(
+            {
+                "uipath__conversation_id": "conv-from-input",
+                "uipath__exchange_id": "exch-from-input",
+            }
+        ),
+    )
+
+    assert ctx.conversation_id == "conv-from-input"
+    assert ctx.exchange_id == "exch-from-input"
+
+
+def test_with_defaults_preserves_fps_when_input_missing_keys(tmp_path: Path) -> None:
+    config_path = tmp_path / "uipath.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "fpsProperties": {
+                    "conversationalService.conversationId": "conv-from-fps",
+                    "conversationalService.exchangeId": "exch-from-fps",
+                }
+            }
+        )
+    )
+
+    ctx = UiPathRuntimeContext.with_defaults(
+        config_path=str(config_path),
+        input=json.dumps({"messages": []}),
+    )
+
+    assert ctx.conversation_id == "conv-from-fps"
+    assert ctx.exchange_id == "exch-from-fps"
+
+
+def test_with_defaults_noop_when_no_input(tmp_path: Path) -> None:
+    config_path = tmp_path / "uipath.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "fpsProperties": {
+                    "conversationalService.conversationId": "conv-from-fps",
+                }
+            }
+        )
+    )
+
+    ctx = UiPathRuntimeContext.with_defaults(config_path=str(config_path))
+
+    assert ctx.conversation_id == "conv-from-fps"
+
+
+def test_with_defaults_swallows_invalid_json_input(tmp_path: Path) -> None:
+    """Invalid input must not crash construction — the real get_input() call
+    during execute surfaces the JSON error at the right layer."""
+    config_path = tmp_path / "uipath.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "fpsProperties": {
+                    "conversationalService.conversationId": "conv-from-fps",
+                }
+            }
+        )
+    )
+
+    ctx = UiPathRuntimeContext.with_defaults(
+        config_path=str(config_path),
+        input="{not: valid json",
+    )
+
+    assert ctx.conversation_id == "conv-from-fps"
+
+
 def test_parse_input_string_returns_none_for_whitespace_only() -> None:
     """Test that whitespace-only input string returns None, not empty dict."""
     ctx = UiPathRuntimeContext(input="   ")