How to Delete a Conversation
To delete a conversation, open your messages tab and find the conversation you want to remove. Tap the options menu (three dots) and select "Delete Conversation."
Deleting a conversation removes it from your inbox permanently. The other person will still see the conversation on their end, but you will no longer have access to the message history.
If you want to keep the conversation but just hide it from your main view, consider archiving it instead. Archived conversations can be restored at any time, while deleted conversations cannot be recovered.