Interfere is a quite remarkable word ...
The meaning ranges from meddling in the affairs of other people, to acting against other things. Some meanings have sinister overtones, some less so.
The West, including the US, is influencing governments and civil society all over the world. Some of this is the work of Western civil society, some is the work of Western corporations, some is the work of government, and some falls in between. Overt government-sponsored interference includes agencies like the Voice of America, the Instituto Cervantes, or the Konrad Adenauer Foundation. And the West is not alone in this. China has the Confucius Institute and Russia has the Rossotrudnichestvo. When agencies like that influence the political developments in a country, those who are against it mutter about foreign control. Both Russia and the United States have a foreign agents restrictions to hinder these activities.
There can be no doubt that Western societies approved of parts of the Euromaidan movement, and provided moral, intellectual, and even financial support. That's different from causing or controlling it.
Coup is another remarkable word ...
Coup stands for coup d'etat, which is generally understood as the violent overthrow of a government by a small, inside group. Opposed to that is revolution, the violent overthrow of a government by a large part of the population. And rebellion, which has connotations of separatism. From outside, one would speak of a coup de main, but that sort of event is not generally abbreviated as just a coup.
So a pat reply would be that the US did not interfere in the 2014 coup because there was no coup, there was a revolution. Which was not directed by the West, as far as we know.