phone poetry

Poets and writers and many other magazines have epistolary poems and postcard poems as prompts for writing poetry.

All the right things to say

Congratulations
On your motherhood
You must be waiting for your husband
She must be missing her father

In phone poetry, who do the words belong to? The one who said it or the one who they are meant for. Now I get what all those writers mean by once your work is out there in the world, its no longer yours anymore.
I think we can read all poems as a one side phone conversation and write up replies to complete it. Much like a response to the poem that another Poets & writer exercise calls for but in the same medium. Like a response to each line instead of the whole poem at once.
For our digital times, text poetry and twitter poetry are welcome. Twitter poetry seems like the 'Roger .. Over' kinds.