As part of your offer, you can ask the seller to pay your closing costs. Whether to ask for closing costs should be a part of your offer/negotiation strategy that you and your agent need to develop prior to making the offer. If you like, feel free to contact me so we can discuss this further.
The seller may or not pay closing costs depending on the condition of the property, how long its been on, what you offer etc. but you need to make an offer first. You will include the "seller subsidy" section (amount you are asking them to pay) in the offer. If I can assist please let me know. Please also keep in mind you are limited to how much you can ask based on the amount you put down and borrow from your lender (usually 3-6%) of the purchase price.