Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: It is a museum located in the centre. Admission is free. Sentence2: What is the address? Sentence3: Your reference number is WFZTQIKD . Sentence4: I have booked your taxi. You'll be expecting a grey lexus. The contact number is 07863326057. Sentence5: williams art and antiques is located at gwydir street, no. 5 dale's brewery Sentence6: I would like to find a place called Williams Art and Antiques. Sentence7: Thank you. Can you also tell me about a restaurant called riverside brasserie? Sentence8: I would like you to book for 8 people on 14:30 on sunday Sentence9: The Riverside Brasserie serves modern european cuisine in the Centre area of town, it is moderately priced. I would be happy to give you more information or book a table? Sentence10: Thank you. I'll also need a taxi to go from Williams Art and Antiques to the restaurant. I need to be there by 14:30. Sentence11: I certainly can. That's a museum in the centre, with free admission. Sentence12: Thank you, goodbye, have a nice day Sentence13: Can you get me information on a placed called williams art and antiques? Sentence14: Enjoy your trip! Thanks for booking through us. Question: Who has spoken the sentence 12? (A) User (B) System
A:
Answer: (A) User