Don't know what to buy

Hi, I’m thinking of buying a Thinkpad for the first time I'm a finance student so all I need is Excel and Microsoft Office, browse web, and watch movie Lightweight and long-time battery are my top priorities, also I prefer a 2x1 touching screen. Another important feature: 16+ RAM, durability, and I want it to last at least 5 years My budget is $500 max, living in UAE Thanks in Advance