Fix minor typo in UG

docs/UserGuide.md

@@ -223,7 +223,7 @@ When using `find`, at least **one** of the optional parameters must be included.
 
 ##### Usage: Find composition
 Composing all 4 types of search will give an `OR` search, a contact that has at least one matching criteria will be returned.
-* `find n/david f/` returns all contacts with a name that partially matches `john`, **OR** are favourited contacts
+* `find n/david f/` returns all contacts with a name that partially matches `david`, **OR** are favourited contacts
 
 ### Sorting the contacts: `sort`