To improve the accuracy of speech recognition for your specific use-case, consider experimenting with the following features of Plivo GetInput XML.
Speech Adaptation With Hints
Improve speech recognition accuracy by providing a set of hint words & phrases expected from the speaker through the hints attribute of GetInput XML.
This feature can greatly improve transcription accuracy of proper nouns, homophones (ex: one, won), and domain-specific words rarely used in the general parlance.
Experiment with the pre-built speech recognition models depending on your use-case. We recommend using the command_and_search model for command driven IVRs, and the phone_call model for more informal speech.
To learn more about Automatic Speech Recognition with GetInput XML, check out the detailed reference documentation here.