Any shallow decision tree where the nuance doesn't matter.

An example might be:

There's something wrong with my order -> wrong size -> order not shipped -> update size on order to small -> small out of stock -> cancel or backorder

or

There's something wrong with my order -> wrong size -> sorry, the order already shipped -> start a return

You can argue that these kinds of things should be supported via direct web UI, and that's fine, but I've seen them backed by chatbots, and I would rather do it on the web than make a phone call for a boring decision tree.

there are a lot of non-native speakers employed in the callcenter business.