IVR with specific needs

[comtech]

Sounds like you need at least TTS. The rest should be accomplishable using dial plan or AGI/ARI.

This thread really helped us a lot with a passable TTS solution.

TTS Engine Custom - Amazon Polly - 24 languages

Polly is an Amazon AI service that uses advanced deep learning technologies to synthesize speech that sounds like a human voice. Polly includes 47 lifelike voices spread across 24 languages, so you can select the ideal voice and build speech-enabled applications that work in many different countries. Important remark The following procedures were performed in a test environment, the propolys-tts.agi file will be modified and then FreePBX will alert you as per the text below; Module: “Text To …

Another good option is Picotts
http://nerdvittles.com/?p=16463