From time to time we are getting support tickets asking us to add Request Type (available in Service Desk projects).
We investigated this case, it is an issue on Atlassian's site - until it's fixed Request type won't be available (issue created:25/Nov/2014).
https://jira.atlassian.com/browse/JSDCLOUD-1211
We've contributed to the case (09/Oct/2017) but It's not fixed yet.
Please vote for this issue and leave comment, maybe Atlassian's Team will look at this again