I can think of a couple ways you could have it be one automation, the first is you'd have multiple triggers with different ids and use the choose action to select the response based on the trigger id.
The other way that I'm a bit less sure about is passing the name of the input_date helper through to the response with a wildcard. You'd probably have to set the {{ trigger.slot.event }} as a variable and match that to an alias or an entity_id.