Hello
I would like to be able to have it so when the player speaks to one character it unlocks a dialog in a topic for another topic.
So when one topic is run and the player chooses a specific dialog that a dialog for a different topic is unlocked. I hope you can understand my question, this has been puzzling me.
Did you check the manual?
http://www.adventuregamestudio.co.uk/manual/Dialog.SetOptionState.htm
Also mind AGS's terminology: a dialog/topic is a collection of selectable options.
Yes I did check the manual but I do not understand how to apply that to add a topic to a conversation to another character.
You can't add an option; just disable it after creating it, then activate it later using said command (presumably inside dialog_request, which is the next thing you should look up in the manual / search the forums for).