I don't know of a way to make data validation auto-suggest based on initial text input. you can use the dropdown menu to show the list contents- do you have too many list items for this to be practical.
I would add that the lack of response may have something to do with perceived attitude in your posts. I have received excellent help from people on this forum but still appreciate that my problems with excel are my own and that any help or work done by others on my behalf is voluntarily given.
This forum operates 24/7 with members in countries all around the world, a question may be answered by someone and then go quite, there are many reasons for this as members have many things to do outside of the Forum, eat, sleep, work, hobbies, family the list goes on and on. A reply and answer may be urgent and important to you but not to the members.
Your "helloooooooo......" will just put people of from helping