Originally Posted by
dunderball
Is it a usual step to call United to see if they can manually book this as a Saver Award?
Usually you only need to call when you can't see the flight on the search at all. But if you're confident you're actually seeing an available flight, it doesn't hurt to call.
(It's more likely you're having trouble with the ANA site, since it's hard to read. For example, it'll let you get to the final step of the search process and offer to let you book even if there's no availability, which is why it's important to make sure none of the segments is waitlisted and also that the results it gave you are actually in the class of service you wanted.)