input: Write a function to create a Flask application that accepts form data for Name, Email, and Phone, and stores it in a SQLite database. Provide an assertion to test that the form submission was successful.
  assert submit_form('Alice', 'alice@example.com', '1234567890')==True
  assert submit_form('Bob', 'bob@example.com', '0987654321')==True
  assert submit_form('Charlie', 'charlie@example.com', '1122334455')==True
  assert submit_form('', '', '')==False
  assert submit_form('David', '', '6789012345')==False
output: def submit_form(name, email, phone):
      if not name or not email or not phone:
          return False
      conn = sqlite3.connect('form_data.db')
      c = conn.cursor()
      c.execute('''CREATE TABLE IF NOT EXISTS submissions
                   (name TEXT, email TEXT, phone TEXT)''')
      c.execute("INSERT INTO submissions (name, email, phone) VALUES (?, ?, ?)", (name, email, phone))
      conn.commit()
      conn.close()
      return True