I want my twitch chat bot to respond to a specific user with a specific reply

Chat and IRC
3 
client.connect();

client.on('message', (channel, tags, message, self) => {
	if(self) return;
	if(message.toLowerCase() === 'hi') {
		client.say(channel, `@${tags.username} peepoHey`);
	}
});

with this command he must respond to a specific user