Dear sir.
Your project attracted my attention at first glance, because I've extensive experience in Speech to Text and Text to Speech conversion. I can also perform diarization.
We can use different API's including IBM watson,Google and AWS for Speech to Text conversion.
I'm really confident about your project, and very eager to join your project.
If we have a chance to cooperate, I'll do my best to provide wonderful result.
Looking forward to your response.
Best Regards.