No, such calls are made repeatedly, and repeately are ignored, no doubt out of the sort of ennui I immediately experienced as a 7-year-old when my mother called out "Time to go for dancing classes, dear boy!".

However, to the best of my knowledge, calls for authentic dialogue have been made but once. Anyone confronted with such a call will not have any option but to reflect momentarily on what the authentic adjective does to the politically correct but somewhat tired word "dialogue", and perhaps will notice that I did not propose constructive dialogue.