Have you sold a house before?

WT
Have any of you ever sold a house that you owned that was really popular in a demanding area and competitive price? 
Today our dream house went on the market and we put up 1000 in earnest money, offered to pay asking price and all 6k in closing costs. 
The thing is, there was 12 showings scheduled for the day & the realtor in charge wanted to "consider all options"🙄 so to me I guess if we don't get the house it'll be because some offered more then the asking price. I wrote the seller a letter and explained that I wanted our baby girl to grow up in that house so I hope we get it. 
If you've ever owned and sold a popular house did a letter make a difference if all your financial demands were met?