"Hi [Name], long time never chat. How have you been?"
"Hey [Name], just thought of you earlier. Hope work and family life have been okay."
"Hi [Name], saw your post earlier. Looks like you've been quite busy these days. Hope all is well with you."
"Hey [Name], something reminded me of our old [office / school / church / team] days. Suddenly thought of you. Hope you're doing well."
"Hi [Name], was just thinking about the old days at [company]. How have things been for you lately?"
"Hi [Name], hope you've been well. How are things with the kids and school routine these days?"
"Hey [Name], hope you've been doing well. How have things been at church / in the community group lately?"
"Hi [Name], hope your week has been okay. Busy as usual?"
"Hi [Name], nice meeting you at [event / class / activity] the other day. Glad we got to chat."
"Hey [Name], good meeting you at [badminton / school event / community session / workshop] the other day. Hope your week's going well."
"Hi [Name], hope you and your family had a good [Hari Raya / CNY / Deepavali / Christmas]. How have things been since then?"
"Hey [Name], I know it's been quite a while since we last spoke. Just wanted to say hi and hope you've been doing okay."
"Hi [Name], was thinking of you while on the way home just now. Hope life's been treating you alright."
"Hey [Name], are you still going for [badminton / jogging / gym / hiking / yoga]? Suddenly thought of that and thought of you too."
"Hi [Name], haven't seen you around for some time. Hope all is well with you and the family."
"How's work been lately?"
"Still busy with the kids?"
"Still attending that class?"
"Still in the same company?"
"How's your church group these days?"
"Still playing badminton on weekends?"
"How have things been since we last met?"