I'm assuming this is a ranked match? Unfortunately, if you dodge, I don't think you have the ability to report. But if you play the match out, and the person is actually going somewhere other than their lane, or taking that into their lane and intentionally feeding with it, you can report them using the system. It's not unheard of for someone to take smite into the top lane. Perhaps the player just wanted to try a red smite roaming kindred mid. Can't say that I would necessarily want to see it in one of my matches, but well, that's why there's a category for griefing and inting.