You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I have no hotels in this area, only guesthouses. Would that work? Sentence2: I am looking for information in Cambridge Sentence3: Okay. Your booking was successful! The reference number is ZWH6Y40Y . Can I help with anything else today? Sentence4: If you take the train departing Ely at 19:35 you will arrive by 19:52, and the cost is 4.40. Sentence5: that's fine, can you book one? Sentence6: What type of information can I help you with? Sentence7: Well, price should be in the moderate but i do want a 4 star hotel. Sentence8: We have quite a few to choose from. Do you have a preference in price range or the area of town? Sentence9: Thank you for choosing help desk. Have a wonderful day. Sentence10: I would recommend avalon, which is a 4 star guesthouse in the north. Will that work for you? Sentence11: The earliest train that days leaves at 19:35 will this work? Sentence12: Yes that works. What is the arrival time and price please? Sentence13: That was all I needed. Sentence14: Yeah, that will be fine. It will need to be on the same day for 3 nights and 3 people. Sentence15: Thanks! I'm also looking for a 4-star accommodation with free wifi. Sentence16: I'll be leaving from Ely on Tuesday after 17:45. Are there any trains available then? Question: Who has spoken the sentence 12? (A) User (B) System
A:
Answer: (A) User