You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Okay, you are very welcome! Goodbye! Sentence2: Yes please for two people at 16:15 on Wednesday please if its not too much trouble. Sentence3: Restaurant Restaurant Two Two is an expensive French restaurant in the north with wonderful food. Would you like to book a table? Sentence4: Yes, could you help me find a nice place to dine in the north. Sentence5: Thats all for today thanks ! Sentence6: Booking was successful. Reference number is : DYAMG2CY . Can I help you with anything else today? Sentence7: The Avalon is a 4 star hotel in north Cambridge that is in the moderate price range. Would you like their phone number? Sentence8: I have made your reservation at restaurant two two. Your reference number is VIVBN8WU . Sentence9: Can you please try French food instead? Sentence10: Do any of these places serve Vietnamese food? Sentence11: Unfortunately, there are no results. Would you like me to search a different area or food type? Sentence12: We have many fine places in the north. I personally recommend the City Stop. Sentence13: Can you tell me about a particular hotel called the avalon? Sentence14: Actually, could you book a room for me? I need it for 2 people, 5 nights. We'll arrive on Wednesday. Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User