how to check item is in inventory

hi, i want to know how i can check if item is in my inventory? and if i have that item (in this case, ‘Football’) then i want my NPC to say a dialogue. it also says a dialogue before, something like ‘find my ball’, but i want it to recognise the ball in my inventory and respond to it. the inventory and npc are different blueprints, since i am a beginner i dont know how to ‘connect’ them. heres the pics, hope someone understands what im talking about. thanks!