after initial contact after NC

So my first contact with my ex after NC went fine, used an opener to achieve contact and continued conversation for a bit then ended it politely, however, ex did not contact me during days 2 or 3 and did not respond back to further contact on day 4. any information on this issue is greatly appreciated.

@Kay - Not much info there, but sounds like he doesn’t want to continue conversations. Don’t contact him again and see if he initiates anything in the future. Good luck.