Merge pull request #117390 from hyoshioka0128/patch-728

Typo "a _Azure AI services_"→"an _Azure AI services_"

Author: Court72

articles/ai-services/LUIS/luis-container-configuration.md

@@ -55,7 +55,7 @@ Do not use the starter key or the authoring key.
 
 ## Billing setting
 
-The `Billing` setting specifies the endpoint URI of the _Azure AI services_ resource on Azure used to meter billing information for the container. You must specify a value for this configuration setting, and the value must be a valid endpoint URI for a _Azure AI services_ resource on Azure. The container reports usage about every 10 to 15 minutes.
+The `Billing` setting specifies the endpoint URI of the _Azure AI services_ resource on Azure used to meter billing information for the container. You must specify a value for this configuration setting, and the value must be a valid endpoint URI for an _Azure AI services_ resource on Azure. The container reports usage about every 10 to 15 minutes.
 
 This setting can be found in the following places: