Update docs (#291)

diff --git a/docs/dyn/speech_v1beta1.operations.html b/docs/dyn/speech_v1beta1.operations.html
index 3bf0c3c..b7eb168 100644
--- a/docs/dyn/speech_v1beta1.operations.html
+++ b/docs/dyn/speech_v1beta1.operations.html
@@ -98,7 +98,10 @@
 `google.rpc.Code.UNIMPLEMENTED`.  Clients can use
 Operations.GetOperation or
 other methods to check whether the cancellation succeeded or whether the
-operation completed despite cancellation.
+operation completed despite cancellation. On successful cancellation,
+the operation is not deleted; instead, it becomes an operation with
+an Operation.error value with a google.rpc.Status.code of 1,
+corresponding to `Code.CANCELLED`.
 
 Args:
   name: string, The name of the operation resource to be cancelled. (required)
@@ -197,7 +200,7 @@
     "name": "A String", # The server-assigned name, which is only unique within the same service that
         # originally returns it. If you use the default HTTP mapping, the
         # `name` should have the format of `operations/some/unique/name`.
-    "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure.
+    "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure or cancellation.
         # programming environments, including REST APIs and RPC APIs. It is used by
         # [gRPC](https://github.com/grpc). The error model is designed to be:
         #
@@ -311,7 +314,7 @@
         "name": "A String", # The server-assigned name, which is only unique within the same service that
             # originally returns it. If you use the default HTTP mapping, the
             # `name` should have the format of `operations/some/unique/name`.
-        "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure.
+        "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure or cancellation.
             # programming environments, including REST APIs and RPC APIs. It is used by
             # [gRPC](https://github.com/grpc). The error model is designed to be:
             #