Looking on the internet deeply has found these results:

Happy to be of help is the most popular phrase on the web.

Glad i could help 1426,000 results on the web	Happy to be of help 128,300,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Well, glad I could help. I'm glad I could help with that, I guess. Well, glad I could help. I'm glad I could help. I'm glad I could help out. Anyway, i'm glad I could help. I'm just glad I could help. Glad I could help entertain you.	Loosely was happy to help the Italian Linguistics Laboratory investigate the paucity of VUE incidence in France. We are quite happy to help clear obstacles to reach the modal shift. I'll be happy to help you in one sec. Happy to be of help, Betsy. Said he'd be happy to help us out. Happy to help you any way I can. I'm happy to be of help. My wife and the FRG would be happy to help you contact any other relatives, arrange for their transportation.

Glad i could help

1426,000 results on the web

Happy to be of help

128,300,000 results on the web

More popular!

Loosely was happy to help the Italian Linguistics Laboratory investigate the paucity of VUE incidence in France.
We are quite happy to help clear obstacles to reach the modal shift.
I'll be happy to help you in one sec.
Happy to be of help, Betsy.
Said he'd be happy to help us out.
Happy to help you any way I can.
I'm happy to be of help.
My wife and the FRG would be happy to help you contact any other relatives, arrange for their transportation.