I appreciate your efforts and cooperation and hope that this will be the forerunner of other transactions in future.
非常感谢贵方的努力与合作,希望这只是我们今后业务往来的开端。
On the other hand, I felt sad that I wasn't able to tell my grandparents that we were safe.
另一方面,我为不能告诉我的祖父母我们十分安全而感到难过。