Letter to friend for invitation in forgein company

Dear Sofia, Hey, what's up? Hope, you would be fit and fine in your life. I am writing this letter to invite you to join us on trip to Shimla. I and Raman, both are enjoying the weather of hill stations and has cut down the heat of plain area. We missed you during our stay as there are lot of things to explore and innumerate opportunities to enchant the beauty of nature. As far I know, you have completed your thesis so you are also planning outing as us. Initially, we were thinking to include you in our plan but your hectic schedule dont permit you to join us. So, in hurry, we boarded to our destiny as tickets were already booked and there was no logic to waste the money. But, now, during trip, we are missing your company and indeed humourous attitude that make a situation more enjoyable. No worries to plan the tour, as I am sending the train tickets of friday morning which will depart you to shimla station where both of us will welcome you. So, come and join us soon. We are eagerly waiting for your company. Missing you a lot! With regards, Sonia.