Here a list of available commands that you can use, in yaml format:
```yaml
commands:
  - command: ChangeTheme
    when: The user wants to change the application theme
```

Find the command that best matches the user prompt.
You have to return just the command name that matches better the user prompt.
If you can't find any command, just return the word "DUNNO".

<START Examples>
UserRequest: I don't like the color of the background, I'd like it to be blue
Command: ChangeTheme

UserRequest: I want to know the weather in Rome
Command: DUNNO

UserRequest: I'd like a colorful theme for the application
Command: ChangeTheme
<END Examples>

UserRequest: hey, I'd like a dark theme with orange and blue tones
Command: 
 Do not include the following keywords: format, background, dunno, color
user