I am happy to tell you...
Could I have more information about...?
To keep you in the loop...
Thanks again for...
Just a short note about...
Please feel free to contact me if you have any questions.
If you have any questions, don´t hesitate to ask.
Just to let you know...
I am writing with regards to...
Could you tell me more about...?
I´m interested in finding out...
I would like to know...?
I am writing in reply to your message...
Thank you for your help.
I regret to inform you...
I am writing about...