'Dialogue' as a noun. Or possibly not

Spotted in a recent piece of corporate communication:

I have already made a personal commitment to dialogue with the union about the changing environment we face


Is this an example of 'dialogue' as a verb or just an example of 'commitment to' + noun?

I've never come across the former before, although it is listed in my Concise OED: "v. chiefly N Amer. take part in dialogue."