Praying to The Holy Ghost?

Ghoti Ichthus

Pray so they do not serve alone. Ephesians 6:10-20
Saw an interesting Bible study/sermon on TV recently about The Trinity, specifically The Holy Ghost, and it got me thinking.

How do we pray to The Holy Ghost?

I mean, when we pray to The Father, it's always in Jesus' Name because that's the only way we can go to The Father, and talking to Jesus always seems a lot more informal.

Not splitting the Godhead because God is God, but it's something I've never thought about before.

Thank you.