Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: No but I'd like it to include free wifi and be in some kind of guesthouse. Sentence2: Can you give me information on the one arriving in Cambridge closest to 20:00. I just need the train ID and price. Thanks Sentence3: The closest arrival time is 19:52, the trainID is TR4883 and the cost is 3.52 pounds. Sentence4: I need to find a place to stay with four stars in a moderate price range. Sentence5: I need to arrive in cambridge by 20:00 please. Sentence6: I'm happy to have assisted you! Thank you for using the Cambridge TownInfo centre. Have a nice day! Sentence7: I have 11 different options available. Did you have an area in mind for your stay? Sentence8: Possibly. I'd like their address, and to know if they have free parking. Sentence9: OK, and what time will you be traveling? Sentence10: Great. Thank you very much for your help. That is all for today. Sentence11: There are 11 hotels that match your search. Would the acorn guest house in the north work for you? Sentence12: Great! Also, I need to take a train from ely on Sunday. Sentence13: Alright, I have eight trains of that type. They leave 35 minutes after the hour every hour, starting at 5:35 and running until 19:35. Would you like to book? Sentence14: They do offer free parking. Their address is 154 chesterton road. Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User