Ok all, I have a question for you. When someone says "eh?" does it require a response of any kind?

Previously I had only interacted with individuals that used this phase sparingly. However I have just met the cream of the crop of excellent customer service in the form of the Rogers Cable Guy (I know, right? So far all customer service here has been better then the US hands down, but this guy is so much better then any Comcast person, you can't even make the comparison.).

Besides his fantastic customer service and overwhelming friendliness (I swear, if this place doesn't make me at least twice as friendly by osmosis in the coming years then there is something wrong with me) he also interjects "eh?" at the end of (on average) every other sentence. I counted. Because of his former two qualities I am making an effort to be an engaged and responsive customer . .. but responding to every "eh?" is kind of overwhelming (there was one sentence where he interjected it twice! How is there even time to respond when they come that frequently?). So seriously, does that phrase actually invite a response? I need "eh?" etiquette!

(This was originally going to be a post on Niagara Falls and trying to impose meaning on your surroundings to provide an anchor to place . . . whoops!)