check for allay holding nothing?

I have an allay spawning with an item and a specific tag, i need a command to run only when the allay with that tag is holding no items cause the player took the item from him. /execute as @e[type=allay,tag=soul,nbt={HandItems:[{id:"minecraft:air",Count:0},{id:"minecraft:air",Count:0}]}] run say Hi this won't run and i think it's cause he's not holding minecraft:air? how can i do that?