Encantado/a de verte, (nice meeting) Encantado/a de hablar contigo. (nice talking to you)

How to say nice meeting you : un gusto conocerte nice talking to you? : un gusto hablar con tigo

Que placer de verte (what a pleasure to see you, although in English I must say that the "what a" sounds a bit extreme. The "que" in spanish gives it the exclamation emphasis) Ha sido un placer hablar contigo (it has been a pleasure talking to you)