I'm glad to be of service.
I'm glad you asked that.
I'm glad to be of assistance.
I'm glad to assist you.
I'm glad you enjoyed it.
We're glad you approve of it!
I'm glad you enjoyed it!
I'm glad to have this opportunity.
I'm glad you enjoyed that.
I'm glad you enjoyed the experience!
I'm glad to assist you today!
I'm glad to hear that!
I'm glad to be of service!