Possible Clues:

• One responsive to voice commands
• Assistant whose reply to "OK Google" might be "Wow. Awkward."
• Answerer without a body
• She can act as a D.J., nowadays
• Who's talking on the phone?
• Disembodied answerer
• "Hey ___" (words to an iPhone)
• Virtual assistant on Apple devices
• Assistant with a goofy beatboxing routine (just ask)
• Assistant on iPhones