import { ConversationForm } from "https://deno.land/x/grammy_conversations@v1.1.0/mod.ts";
Waits until the user sends one of the given strings, and returns the
selected string. This is escpecially useful if you previously sent a
custom keyboard, and you expect the user to press one of the keyboard
buttons. If the user does something else, these updates will be skipped.
You may specify the otherwise
handler that is called in such cases.
Among other things, this allows you to tell the user that they need to
select one of the given options.