Apple Inc. unveiled software that will allow its voice-activated personal assistant Siri to order pizza, call for a cab or check a bank balance, trying to keep pace with virtual assistants from Amazon.com Inc. and Alphabet Inc.’s Google.

The new software for Siri will enable programmers to build the voice-activated assistant into their apps,  Craig Federighi, Apple’s software chief, said Monday at the Apple Worldwide Developers Conference in San Francisco.