My work forces me to message a lot of different clients and it's quite annoying to have to save all these people as contacts on my phone, taking space and a lot of time it's clients I won't talk to more than once a year. It would be incredible to have the option to customize the name for conversations with only one person. This way I won't have their number just sitting there and be forced to either save them as a contact or have to read the whole chat in order to figure out who I may be speaking with. Just an option to give unknown numbers a nickname.