So that even if you type only a part of the name, the corresponding phone number is printed out.

//
dic={'Hong Gil-dong':'010-4444-5555','Kim Jungang':'010-9191-8181','Simcheong':'010-3232-5454'}


while True:
    user = input ('name>>')

    namelist = list(dic.keys())
    numberlist = list(dic.values())
    if user in namelist:
        print(user, dic[user])
    else:
        if user == 'add':
            newname = input ("What is your name?")
            newnum = input ("What's the phone number?" ")
            dic[newname] = newnum
            print(newname, "Phone number added.")
        else:
            print("Not Found".")
    continue