Add interesting people to your "Favorites" list in order not to lose the conversation with them and quickly find her or him when needed.
From your computer:
Go to "Messages" by clicking on the icon in the bottom menu > select the desired conversation > click on the bookmark icon - now you can find this person in the "Favorites" list.
Besides, you can add a partner to "Favorites" by going to his or her profile - click on the bookmark icon in the top right corner.
To add a person to "Favorites", go to "Messages" by clicking on the button in the top menu > click on the three-dot icon opposite the conversation with a partner > select "Add to Favorites". Or go to the profile of the partner and you will see an "Add to Favorites" button in the top right corner.