Something related; I wish "Let's chat, call me when you are available" button for Whatsapp,Telegram etc. Or even better, ability to suggest a few time slots to

Something related; I wish "Let's chat, call me when you are available" button for Whatsapp,Telegram etc. Or even better, ability to suggest a few time slots to the callee. That might help with not being able to write "hey my friend, I miss you. Let's chat sometime" messages and unable to decide on that "sometime". An app with SMS/phone calls wouldn't work well for me as most of my friends are in another country so it needs to be VoIP.