I would of deleted Liz from my contacts lol. I hate the Pokegear call. Lyra is so annoying. "Today I looked over at my Marill and watched it evolve into a Azumarill." Then 5 min later. "Today I loved over at my Marill and watched it evolve into a Azumarill." She say's the same stuff over and over and makes me wanna delete her number lol.
But they only time I save a number is if the person has really good Pokemon and wants to battle in the future. For example the Fire Breather with 2 Magmars. I saved him because Magmar gives out decent exp. Also, not to mention the people that give out free items. I just got a free Leaf Stone a couple days ago.