hash – John the Ripper is unable to crack my sha1 hashed password

The syntax based on the information provided should be:

galoget@hackem:~$ john -format:RAW-SHA1 -wordlist:rockyou.txt testing.txt
Using default input encoding: UTF-8
Loaded 1 password hash (Raw-SHA1 (SHA1 256/256 AVX2 8x))
Warning: no OpenMP support for this hash type, consider --fork=8
Press 'q' or Ctrl-C to abort, almost any other key for status
Warning: Only 1 candidate left, minimum 8 needed for performance.
kaiaisthecutest  (?)
1g 0:00:00:01 DONE (2021-07-11 18:31) 0.9900g/s 14201Kp/s 14201Kc/s 14201KC/s 
Use the "--show --format=Raw-SHA1" options to display all of the cracked passwords reliably
Session completed

Where testing.txt contains one line with the hash:

7b96bcf29b0982c3fd78f129a432e640346515b1

If you want to show it after cracking it, you can use the following command:

galoget@hackem:~$ john --show testing.txt
?:kaiaisthecutest

1 password hash cracked, 0 left

As you can see, the command works, I think that the reason of why you could not crack the hash is that you don’t have a dictionary with the correct word.