Shalini Pandey, known as Bollywood's second Alia Bhatt, is extremely bold. She looks amazing in ethnic as well as western dresses.
The 'Jayeshbhai Jordaar' movie fame looks stylish in a black gown. You can take inspiration from her look for the office cocktail party.
You can go to the office cocktail party wearing a shimmery saree like Shalini. Saree with bralette blouse is giving a hot look. You will get this type of saree within 3-4 thousand.
Although this dress is quite bold, you can get the dress customized in the same pattern if you want. Get a skirt made from red plain fabric and a full neck crop top.
Slit cut skirt with crop top is creating a very sexy look. You can try a purple colored sequence dress at a cocktail party. You can also pair a lehenga with a crop top.
Black color off shoulder dress is a perfect party outfit. This type of dress gives a smart look to young girls. You can get the same pattern tight fitting dress.