icons - How do we represent that a search feature has "intelligent" capabilities?

My software company is beginning to implement "intelligent" query capabilities to the usual search boxes for our customers and I think that this necessitates the need to evolve from the old standard magnifying glass icon to something else.

For example, consider the search box right here on Stack Exchange:

This makes sense to have the traditional magnifying glass icon because it is a traditional search. However, the same "search" box in some of the applications we currently have in development are "intelligent" or "bot-enabled" which means that it almost becomes more conversational instead of a one-way simple command.

For example, instead of simply typing in "AA Batteries" to see a list of search results, the user could type in "Add AA batteries to my cart, 36 pack" or "Buy 36 pack of AA batteries" and their request is carried out by the smart algorithms.

We are seeing many new requests for this type of thing and the underlying technology is common now and works well (you have probably used a personal assistant today already).

To take this even one step further, we are also seeing requests to enable microphones (speech inputs) to these boxes in addition to text (keyboard). I am not sure if this should be a second icon or if there is some sort of "omni" icon that can serve as a single call to action (in other words, the user recognizes that once they click it they can begin talking OR typing).

In Windows 10, both the mic and the magnifying glass icon are shown when the textbox has focus, but I can't help but feel like there is a better, more unified way to convey the combined capabilities:

It looks like Google is just using a mic and, as Anthony Hobday pointed out below, people seem to know that the Google search capability does much more than just search:

As far as iconography goes, the best I can come up with is either an ear abstraction or a soundwave abstraction to indicate that the system will listen to you:

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Problem is, this doesn't necessarily indicate that the system is "intelligent".

Answer

Use a small stylised graphic of a persons face / head and shoulders next to the search box - rather than the magnifying glass.

With increasing penetration of the Siris and the Alexia's into the market place people will get used to being able to interact with 'digital assistants' and the line between whether you are actually dealing with a human or a machine will get increasingly blurred.

You might want to add a microphone icon which appears - in the text box - when someone clicks into it to signify that the assistant is now actively listening.