| caller_id | recipient_id | call_time | | --------- | ------------ | ------------------- | | 8 | 4 | 2021-08-24 17:46:07 | | 4 | 8 | 2021-08-24 19:57:13 | | 5 | 1 | 2021-08-11 05:28:44 | | 8 | 3 | 2021-08-17 04:04:15 | | 11 | 3 | 2021-08-17 13:07:00 | | 8 | 11 | 2021-08-17 22:22:22 |