Fix Odd Bug

[hchiam]

Apparently the mic is sometimes still on with no prompt when the user says "nothing" or "no".

From feedback: (not sure if this is the good/bad example)

• Action: What's the secret word?
• User: Nothing
• Action: Code Tutor version 4, signing out. Come again for updates.
• Code Tutor left the conversation

Or:

• Action: What's the secret word?
• User: No
• Action: Code Tutor version 4, signing out. Come again for updates.
• Code Tutor left the conversation

Things to check:

• does the secret word request actually respond with nothing and still is listening to "nothing"/"no"? (might be timing bug, not my code's problem)
• otherwise, if it responds with "Code Tutor version 4, signing out. Come again for updates.", then that is intended. but if the mic is still on, then check if it properly exits. might need to set custom js fulfillment code to exit.
• are there other intents that are listening for "nothing"/"no"?
• if it does properly exit (i.e. with message and with mic off), then get more info/feedback