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

Sentence1: That is perfect can I have the postcode please? Sentence2: Awesome! I will also need to book a tai to go from the hotel to the nightclub. Sentence3: I just need to verify some information before I book anything. Do they still have wifi, and have the prices stayed moderate? Oh, and they are in the East, correct? Sentence4: Can you recommend me a nightclub where I can get jiggy with it? Sentence5: They are in the east, yes, and they are still considered a moderately priced guesthouse. And they also have free parking and internet. Sentence6: Thanks. Last time I stayed in Cambridge several years ago I stayed at the carolina bed and breakfast. Is it still around? Sentence7: Yes, I would like to book a taxi to leave the hotel by 11:00. Sentence8: Hello. I will be a tourist in Cambridge and I've heard there are many local attractions. Sentence9: Well, I think the jiggiest nightclub in town is the Soul Tree Nightclub, right in centre city! Plus the entrance fee is only 4 pounds. Sentence10: Yes, they are in the east, prices still moderate and they do have wifi. Is there anything else I can find out for you? Sentence11: Yes, we actually have over 79 attractions. Do you have a specific area of town or interest of attraction you are looking for? Sentence12: That is all I need today. Thank you for your help! Sentence13: Sure! The postcode is cb23qf Sentence14: I got a blue Audi for you. Their number is 07962712381. What else do you need? Sentence15: Yes, it is still around. Would you like me to book the Carolina Bed and Breakfast? Sentence16: You're welcome. Have a good day! Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User