Help to understand lookup tables

Hello! I am trying to use lookup tables to save username.Problem in that if I enter name which listed in username intent rasa understands it as name but if I enter name which listed in names.txt and not in username intent it does not recognize it as name,but I have provided path to names.txt 1

1 1 My main goal is to extract username then ask "How are you + username " and save username in slot.I use lookup table because I can’t handle all of names do I think it is easier to list them in one txt file