Question

We regret to inform you that .....

We are sorry to tell you that...

We are sorry to say that

Answer 1

Here are some different ways to express regret in a formal manner:

1. We regret to announce that...
2. It is with regret that we inform you that...
3. Unfortunately, we must convey that...
4. We sincerely apologize for having to tell you that...
5. We are disappointed to share that...
6. Regrettably, we must inform you that...
7. It is unfortunate that we have to say that...
8. We are saddened to inform you that...

Feel free to choose any of these options or let me know if you need further assistance!