This is for the speech synthesizer which include states like playing finished. 

States

SpeechSynthesizer has the following states:

PLAYING: While Alexa is speaking, SpeechSynthesizer should be in a playing state. SpeechSynthesizer should transition to the finished state when playback of Alexa’s speech is complete.

FINISHED: When Alexa is finished speaking, SpeechSynthesizer should transition to the finished state following a SpeechFinished event.

So today  i started with this part.