Jun 8, 2016 - 5:46 AM
Hi Sanju, welcome to MySwissAlps!
I'm not Annika but I'm going to take the opportunity to answer anyway ;-)
I assume your first stop is Lucerne. Most of your plan looks fine to me. Just one tip: there is no old town in Interlaken (not like in Lucerne or Bern), nor is there much to see otherwise. You can have a stroll but it's not the most picturesque town in Switzerland. Please see the Interlaken page for other things to do in the area. Be sure to check the weather forecasts. If day 3 is a nice day you can go up to Jungfraujoch then, and leave day 4 for something else. Good weather is essential for a Jungfraujoch visit.
Did you already arrange for your train passes? If not, today is the last day to obtain print at home passes for the 13th. Please see www.swissrailways.com/ en or here for other options.
By the way, I found your post hard to read. Please check our forum rules and do not use the abbreviations/text talk; it's quite hard to understand. Thanks!