You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I suppose one night wold be fine as long as we can get a reservation for 3 people. Sentence2: I have a few rooms, could you tell me the area of town you would prefer? Sentence3: Thank you. We'll be happy to help you with your future travel needs. Sentence4: There are 11 different hotels to choose from. What part of town would you like to stay in? Sentence5: Sounds good. Starting Monday, please, for 3 people, 3 nights. Sentence6: That is all. Thank you. Sentence7: I want to find a 4 star hotel with a moderate price. Sentence8: Carolina bed and breakfast is a moderately priced four star guesthouse with wifi and parking, in the east area. Would you care to make a reservation? Sentence9: I was able to get you a room for 3 people for 1 night, starting Monday, at the Acorn Guest House. The reference number is GXTSRBY0 . Sentence10: I'm sorry, there are no rooms available at that time. Would you like a different day or shorter stay? Sentence11: Do you mean in the center of town? Sentence12: I prefer a hotel near the main street. I want a hotel that includes free wifi Sentence13: It doesn't matter. Sentence14: Actually, location doesn't really matter, so long as it's moderately priced, 4 star, and offers wifi. Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User