'Hi X. Thank you for having DS1 tonight (sleepover). Have a lovely holiday and look forward to hearing all about it when you get home.'
I'm really not very good at text etiquette I tend to text as I would speak e.g.
Hi X. Would be lovely to see you, fancy a coffee at Y cafe next Tues or Wed? Hope everyone including your cat, neighbour, best friend..... (you get the picture) are well. Xx
Whereas what I often get from people is
'Coffee, Cafe Y 3pm Tues?'
Which if I'm honest I find a bit rude 
Very happy to be told that I am being totally old fashioned unreasonable 