||Sorry I've been out of cyberworld a bit...
Sorry I've been so out of communication for the past few days.
Sorry I've been such a bum at replying to your emails.
Sorry for the email lapse...
||Great to hear from you!
Hope you're having a good morning!
Enjoying the day?
Hope you had an awesome weekend.
|Getting to the topic
||I was wondering whether...
The point why I'm writing is that...
I just wanted to ask you if...
By the way, what about...
|Wrapping it up
||So, that's it for now
OK, I'll get back to you asap ...
OK, have to run now...
Talk to you soon.
Have a good time.
All the best.