update: cancel instruction on README file

README.md

@@ -11,10 +11,19 @@ sh <(curl -s https://git.lucasf.dev/public/remind/raw/branch/master/install.sh)
 ## Usage
 
 Example of usage:
+> The time can be (s|m|h)  
 
 ```bash
 remind do something cool
 > Time to delay: 15m
 ```
 
-The time can be (s|m|h)
+
+To cancel some reminder:
+
+```bash
+remind cancel
+> [1] do something cool
+> [2] do another one
+> Please choose a number to cancel [1-2]:
+```