phrase/il n‿i.j‿a pa də kwa/
don't mention it, not at all, think nothing of it, you're welcome
Synonyms: de rien, pas de quoi, bienvenue, ça me fait plaisir, service, s'il vous plaît, s'il te plaît
Related: pas de quoi
Literally, “there is nothing for which (to thank me)”. Compare Spanish no hay de qué, Portuguese não há de quê and Italian non c'è di che, all calques of one another.