1.Iamwritingtoexpressmysincereappreciationfor...
2.Thankyouforyourkindwords/invitation/gift.
3.Iamdelighted/pleasedtoinformyouthat...
4.Iregrettoinformyouthat...
5.Iamwritingtoinquireabout...
6.Iwouldliketosuggestthat...
7.Ifeelcompelledtowritetoexpressmyconcernsabout...
8.Ihopeyouaredoingwell.
9.Pleaseletmeknowifyouneedanyfurtherinformation.
10.Ilookforwardtohearingfromyousoon.
11.Bestregards/sincerely/thankyou.
12.Iwouldliketoapologizeforanyinconveniencecaused.