Say "Hey Monkey" and then talk
I only respond to "Hey Monkey", just like "Hey Google".
Here are the possible tests:
'hey monkey did you watch Planet of the Apes'
NEGATIVE REPLY
'hey monkey banana'
POSITIVE REPLY
'hey monkey are you a real monkey'
IGNORANT REPLY
'hey monkey'
YES
'hey monkey *anythingelse'
RANDOM REPLY