Exam MB-300 topic 2 question 4 discussion

You are implementing Dynamics 365 Finance.
Local customer service agents answer phone calls from customers and vendors on invoices and payments. All conversations with customers and vendors are recorded and documented.
Due to a quality assurance issue, not enough customer service agents are available to handle customer volume for invoices and payments.
You need to implement a technology to answer customer questions for invoices and payments.
Which technology should you use?