Enable Assist (conversation)

Hello, I am trying to install the conversation integration but it is not listed when I search in the integrations.
I am using the latest HA
ha version
And my configuration.yaml is:

# Configure a default setup of Home Assistant (frontend, api, etc)
default_config:


http:
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem
  ip_ban_enabled: true
  login_attempts_threshold: 5
  
# Example configuration.yaml entry
alarm_control_panel: !include alarm_control_panel.yaml

# Text to speech
tts:
  - platform: google_translate

automation: !include automations.yaml
script: !include scripts.yaml
scene: !include scenes.yaml
homeassistant:    
  allowlist_external_dirs:
    - "/config"
sensor:  
  - platform: systemmonitor
    resources:
    - type: processor_use
    - type: disk_use_percent
      arg: "/"
    - type: disk_free
      arg: "/"
    - type: memory_use_percent
    - type: network_in
      arg: eth0
    - type: throughput_network_in
      arg: eth0
    - type: network_out
      arg: eth0
    - type: throughput_network_out
      arg: eth0
    - type: processor_temperature
    - type: last_boot
  - platform: command_line
    scan_interval: 60
    name: CPU Temp
    command: "cat /sys/class/thermal/thermal_zone0/temp"
    unit_of_measurement: "°C"
    value_template: '{{ value | multiply(0.001) | round(2)  }}'
  - platform: filesize
    scan_interval: 1800
    file_paths:
      - /config/home-assistant_v2.db

Any assistance is appreciated

Thank you

Sorry, but that link doesn’t look like “instructions” at all. Just a set of statements.