In addition to all the entertainment, LG smartphone also allows you to delete a single message (SMS). You can remove received or even sent messages from the device, but please note that the messages are only removed on your own device and not on the recipient's.

Android 9 | LG UX 9.0
Step 1:  Open the  Messages -App
Step 2:  Tap on desired  Conversation
Step 3:  Tap an hold  message  you want
Step 4:  Tap on  Delete
Step 5:  Confirm with  Delete
  1. Open the Messages-App
  2. Tap on desired Conversation
  3. Tap an hold message you want
  4. Tap on Delete
  5. Confirm with Delete

LG Instructions