1.
Thank
you
for
your
recent
letter
regarding. . . 】

2.
I
am
writing
to
address
your
concerns
about. . . 】

3.
I
have
received
your
inquiry
and
wanted
to
provide
you
with
the
necessary
information. 】

4.
I
appreciate
your
prompt
response
to
my
previous
correspondence. 】

5.
I
hope
this
letter
finds
you
well
and
in
good
health. 】

6.
I
am
writing
to
express
my
dissatisfaction
with. . . 】

7.
I
want
to
apologize
for
any
inconvenience
caused. . . 】

8.
I
would
like
to
bring
to
your
attention
the
following
matter. . . 】

9.
I
am
reaching
out
to
discuss
the
issue
you
raised
during
our
previous
communication. 】

10.
I
trust
this
email
finds
you
in
high
spirits. 】

11.
Your
recent
letter
has
prompted
me
to
address
the
matter
at
hand. 】

1
2.
I
would
like
to
provide
additional
information
regarding
the
subject
you
mentioned. 】

1
3.
I
would
be
grateful
if
you
could
kindly
clarify
your
concerns. 】

1
4.
I
appreciate
your
patience
in
addressing
this
matter. 】

1
5.
I
am
writing
to
inquire
about
the
status
of. . . 】

1
6.
I
regret
to
inform
you
that. . . 】

1
7.
Further
to
our
recent
conversation,
I
wanted
to
put
my
thoughts
in
writing. 】

1
8.
I
wanted
to
follow
up
on
our
previous
correspondence
with
regards
to. . . 】

1
9.
Your
continued
cooperation
in
this
matter
is
greatly
appreciated. 】

20.
I
look
forward
to
your
prompt
attention
to
this
matter. 】