Sure, you can use this format, which I used to mail his office.
In the mail subject, write this: Enquiry into PR Application: XXXXXXXX / Full Name
Dear Mr Goodale,
Forgive me for troubling you, as I'm well aware of the enormous amount of responsibilities an MP has, and I recognise that your time is of the utmost importance. I would not be writing this, had I an alternative to my problem.
I applied for Canadian PR, under the Federal Skilled Worker (FSW) program on October 06, 2018. It has been 111 days since I last received any communication from IRCC, and 278 days (9+ months) since I applied for Express Entry.
I would be extremely grateful for your help in inquiring about the current status of Eligibility and Security, for my application. I do not have a clear idea of the status of my application, since every time I call, I receive vague answers and requests to wait a little longer.
I look forward to hearing from you at your earliest convenience.
Sincerely,
Full Name
DOB: DD/MM/YYYY
App. No: XXXXXXXX
UCI No: XXXXXXXX
App. Date: DD/MM/YYYY
Country of Citizenship: XXXXXX
Country of Residence: XXXXXX
Replace the various details with your own. Send when it's about 11 AM in Ottawa, I found that's the most optimal time to receive a reply.