do you think a person can hold simultaneously more than one conversation?

my question steams from the movie "Her" combined with me trying to become ambidextrous. In the movie, the OS(operating system) could simultaneously hold thousands of conversations.
Do you think it is even possible for a human to -at the same time- converse with two others?

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SW-User

I've held multiple individual conversations on many occasions.

What doesn't work is having a single conversation with multiple people simultaneously without interrupting each other, at some point.