Want to pass user input through dialog between transaction (ttsbegin and ttscommit)

I want to pass user input through dialog between transaction (ttsbegin and ttscommit). But system throws an error like :- can not do user interaction between ttsbegin and ttscommit?

Can anybody have any idea regarding this. If I want to do user interaction between transaction then how can I do?

Please guide.

Thanks,

Prashant