You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Let's go for the guesthouse please Sentence2: Please give me their price range and postcode. Sentence3: Yes I can. Is there a type of food that you are looking for? Sentence4: Alexander Bed and Breakfast is the guesthouse. Would you like me to book it for you? Sentence5: Nandos City Centre is a Portuguese Cuisine in the town Centre. Would you like to make a reservation? Sentence6: I am looking for a place to dine in the Centre. Can you help me? Sentence7: Yes, I am also looking for a 4 star hotel. Sentence8: Yes it has free parking and free wifi. Sentence9: i would like it near the centre. Sentence10: I have one guesthouse and one hotel that would work. What price range did you want? Sentence11: Can you tell me if it has free parking? Sentence12: Absolutely! The price range is cheap. It's postcode is cb23ar. And the address is 33-34 Saint Andrews Street. Can I help you with anything else? Sentence13: check for portuguese food. Sentence14: Sorry there are no matches do you want me to look for any other type of cuisine? Sentence15: No reservation but can I get the price range, the post code and the address? Sentence16: Cheap price range and postcode is cb12e Sentence17: Light bites, please. Sentence18: What area of the city would you like the hotel to be in? Question: Who has spoken the sentence 12? (A) User (B) System
A:
Answer: (A) User