Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
@You-Hsuan Jaing With respect to your above request while adding the example utterances there is no entity name or location in the entityLabels key. Do you intend to add the utterances without any mapping to the entity?
Based on the error mentioned are you using both the AppId and version in the URL? It looks like one of them might be missing in your request URL? The format should be of the following type for your URL with both the app id and the version.
https://{endpoint}/luis/authoring/v3.0-preview/apps/{appId}/versions/{versionId}/examples
The ExampleId field also seems like a response from the add operation of the utterances rather than the request body.