Possible Clues:

• Assistant who's a good listener
• Her voice was first heard in 2011
• HomePod answerer
• iPhone's voice-activated personal assistant
• Her 'birthday' is Oct. 4, 2011
• Voice-activated app for 6-Down
• 'Hey ___'
• Intelligent assistant on the phone gets flower sent up
• Alexa, on an iPhone
• Voice from a phone