You may request to borrow the amount you need, however if this loan amount is approved is within the discretion of the bank. You may not receive the full amount and in fact, may have an approved loan of a lower amount.
Again, this is because your maximum loan amount is dependent on a few factors including your monthly income, credit history and credit score and debt service ratio.
Please see the section on Things to Consider Before Applying for a Personal Loan and Charges and Fees for more information on borrowing limits.