Hey Nidhi,
Budget destinations under a lakh for two are:-
Malaysia
Sri Lanka
Bhutan
Maldives
Singapore
Thailand
Bali
Dubai
Mauritius
I would suggest one more destination in our India only, which can make any international destination to bow ...
The Andaman and Nicobar Islands...
See that you finalize your destination and book your tickets affront as you might get them cheap when booked earlier
Happy Travelling!!!