My sister's friend birthday

My sister's friend is an auto driver. He has a very nice personality. His hobby is to help others Next month his birthday coming and he told his all friends that he is going to book vegas tour deals for all his friends on his birthday. He wants to celebrate his birthday on its beautiful attractions. But my sister is confused about her dress so try to suggest here which stuff will remain best for my sister next month's trip. I am waiting for a fast response...