#!/usr/bin/expect

set host "1.1.1.1"
set user "username"
set pass "p@ssw0rd"
eval spawn "sudo openconnect $host"

set prompt ":|#|\\\$"
expect Enter
send "yes\r"
expect GROUP
send "ssl3\r"
expect Username:
send "$user\r"

expect Password:
send "$pass\r"

interact