Codigo
#!/usr/bin/python3

import requests
from bs4 import BeautifulSoup

r = requests.get('http://10.10.10.173')
soup = BeautifulSoup(r.content, 'html.parser')
name = soup.find_all(class_='message-author')

def names(name):

        for i in range(len(name)):
			print (name[i].get_text())

if  __name__ == '__main__':

        names(name)

Resultado
---------

Richard Miles
John Doe
 Tarah Shropshire
Mike Litorus
 Catherine Manseau
 Domenic Houston
 Buster Wigton
 Rolland Webber
 Claire Mapes
Melita Faucher
Jeffery Lalor
Loren Gatlin
Tarah Shropshire