Global Breaking News - Saturday, April 27, 2024

Dear

It has been so long since we have had the opportunity to
be of service to you, that I have begun to wonder if perhaps,
we have offended you in some way in the past.
* be of service to ~ = ~에게 유용하다(유익하다)
* offend = 기분 상하게(불쾌하게) 하다

If this is the case, I would greatly appreciate knowing what
happened. In fact, if you have any grievance with our firm,
I wish that you would call so that we might discuss the problem.
* grievance = 불만(고충) [사항]

We have introduced many innovations into our product line
since the last order you placed with our firm, and if the reason
we haven't heard from you has nothing to do with a complaint,
we would appreciate having the opportunity to show you these
innovations.
* introduce A into B = A를 B에 도입하다/ product line = 제품 라인

In either case, it would be wonderful to hear from you.