The most casual way of saying it, in 'Latin American' Spanish, is "Hablamos pronto" This can be literally translated as "[We'll] talk soon" However, if you're trying to speak in 'Spaniard' Spanish, this will probably sound less natural.

charlaré contigo pronto. te platicaré pronto. te hablaré pronto. hablaré contigo pronto. its common in spanish (specially in my country) to say: tan pronto como lo sepa, te hablo ( as soon as possible I know it, I 'll call you

Hello Stephen, Literally it would be : Te hablo luego Other ways of ending a conversation with similar meanings: Hablaré con tigo pronto Te platico mas tarde ( platicar = chat ,talk to ) Te hablo al rato :)