Today I will show you a trick by which you. Can create fake conversation on Whatsapp see here
And this is very helpful to you .
So to do this follow given step
Step1:Download what said app from here
Step2:open whatsaidd and tap any where yow want to change
http://admaster.union.ucweb.com/appwall/applist.html?pub=Isha@ideastore4u any thing.
If you have any problem ask in comment box.