Hello ladies/gents lol

Not too sure how to word the title. How do you experienced ladies book a hotel for say for e.g. 7 days and you get the option of cancelling (shown when booking). However you only want to try for 2 or 3 days break clause where if business or for whatever reason is disappointing you do not get charged for the remaining days? I hope I am making myself clear

lol I want to try a place for 2 or 3 days then if good extend. However if I only book the 2 or 3 days only and after day 1 find out I want to extend there maybe no vacancy all the rooms maybe booked up. At the same time, I do not want the financial commitment of supposing after say day 2 I do not like it, I do not get charged for the rest of the days.
Someone kindly help me with this. Thanks people. xx