Conditional branch for when all options are exhausted.

I've got a support/social link system set up with lots of switches. Whether this works with multiple characters is to be seen, but I need some diagloue to pop up once all available options are exhausted. Some sort of "if none of the above, then this." This way when the "Talk" option has no where to go, it doesn't just loop back into itself and feel off.

With multiple characters having multiple support conversations(all in the same event((the 'support' can only happen in a safe area))), I don't currently have any solutions in mind.