[Ranama]

Use OnPlayerPickUpPickup(pickupid, playerid)//don't realy know if it's like this but something like this
then you'll have to create a TextDraw, like this
https://sampwiki.blast.hk/wiki/TextDrawCreate
and when a player PickUpPickup you'll show the TextDraw for that player.

Hope you understand something

Or if you wanted to have a dialog you'll have to ShowPlayerDialog instead of ShowPlayerText etc