Replying to a string

[LuisN]

When Alice prompts you to enter a string, is there any way that I can get an object to reply to that string? First instance:
cat say "what is your name"
randomguy2 say "ask user for a string question=default string"
I want the cat to reply to the name that the user types in, if that is possible. Thank you ^_^

Also, I hope I am not asking for to much, but if there is no way to get the cat to reply to the string, could someone please tell me how to ask the user for a number (such as pick a number between 1-10) and depending on what number the object does something... Sorry!