UI components

Hello

I have extensively use label, push button, layout , tree and table for Creo toolkit UI.

We are planning to take input from user dynamically... Confused what component of UI should be used for dialogue to take input...

We need to develop something like help assistant we see on any of the website... For example , once we go to some sites , they ping us like how may I assist you...We respond and again that person ask next question..

Can any one throw some light on how to do so by using which components from UI...??

Thanks in advance...

Regards
Ketan