Hi Niladri,
We do work with waitlisted students, but it is a little hard to outline what to do in a general sense. We do recommend composing a great response letter (we have a package for this) and our rule of thumb is that there are no cool points, so if you can think of respectful ways to stay in touch with the admissions office, you should go for it.
Just know that at the end of the day, the most important thing is totally out of your control: Booth has to go to its waitlist. The good news is that Booth traditionally has had movement on the WL (as opposed to a school like HBS with a 90% yield where they pretty much never use it), but the bad news is that Booth is hotter than its been in years, so I expect a pretty strong yield.
I believe you have filled out our client survey form, so we will probably be having a consultation call with you soon. Look forward to discussing this in greater detail at this time.
Respectfully,
Paul Lanzillotti