Example templates:
Thanks for your suggestion, We'll look into this.
Yours Very Truly,
GM
Thanks for reporting this issue, we've informed Jirato
Yours Very Truly,
GM
Thanks for reporting this issue, I am Jirato and I have been informed.
Yours Very Truly,
Other GM
Thanks for your opinion, I guess.
Sincerely,
GM
It might set the playerbase at greater ease that they know their issues are or aren't being worked on.