Ask for data

Dear Sir/Madam
I am writing in reference to ask you about registration deadlines of for the USM.
I'm going to send my application forms for the next semester, but unfortunately I couldn't find the university calender calendar in English. I searched in some other resources, but they mentioned different dates.
I would be most grateful if you could send me the document or let me know where I can I find the data.

I look forward to hearing from you.

Yours sincerely,

Shabnam Leylian

Ask for data

Dear Sir/Madam
I am writing in reference to ask you about the registration deadlines of the USM.
I'm going [or "planning"] to send my application forms for the next semester, but unfortunately I couldn't find the university calender in English. I searched in some other resources, but they mentioned different dates (and not the registration deadline that I was looking for)*.
I would be most grateful if you could send me the document [=university calendar?]  or let me know where can I find the data information.

I look forward to hearing from you.

Yours sincerely,

Shabnam Leylian

*It helps to be specific about what you're asking for here, since I wasn't sure from the sentence what information was contained in the other resources with the "different dates". Did they show a different deadline, or just other dates that weren't applicable to you?