Whisper menu with options?

[Busi]

I'm looking for a addon that possible would let me create a menu with options in

People would whisper me a triggerword and the addon would reply in whisper the menu with a little guide on how to

like i could set one up with a short text could be what I'm selling in categories

like !menu would reply with
Hello welcome to my shop, I'm selling this in the following categories
1: Materials
2: Transmorg
3: pets
4: mounts

and people can then whisper !menu, !menu 1, !menu 2, !menu 3, !menu 4 and so on to see what i have in each categories with name and prices

do any know of a addon that could do this or anything like it?