Hey,
you can just send them:
"Dear SIr/Madam.
I would like to find out the current status on my application.
Name:
File number:
Date of birth:
Unique Client Identifier (UCI):
Thank you,
--
Personal suggestion, DO NOT contact them.
The reasons for this are:
1. Your timeline looks perfectly fine - no requests for some extra docs
2. You are only 4 months since you applied, while the processing time is IN AVERAGE 6 months
3. Based on your current stages of the application, you might even receive PPR this or next week
4. The agents will not give you any other information that you see on your MyCIC account
5. You will just annoy them (Sorry, but that's the truth. They are doing their job as fast as they can, and are within the timeframe)
I would not contact them at least until mid October because emailing them will not change the speed of processing of your application at all. Instead, it will make you even more stressed and frustrated, because their reply will be the copy/paste of your MyCIC account info that you can access yourself (lots of members of this forum can confirm the inefficiency of sending emails to them).
Just forget about the application now, and enjoy the last summer days
By November you will get it for sure