Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: We have 2 of those. Would you like a guesthouse in the north or centre? Sentence2: I would like a guesthouse in the north please. Can you check if it has free parking? Sentence3: Your booking was successful, the total fee is 51.2GBP, payable at the station. Reference number is YSJ6ZWYT . Anything else I can help you with today? Sentence4: I would prefer a guest house if any 0 stars are available. Sentence5: Leaving Cambridge and headed to Stevenage, please. Sentence6: You're very welcome! Have a great day! Sentence7: I have a 15:21 or a 17:21 train, arriving 49 minutes later at 16:10 or 18:10, respectively. Would you like me to book one for you? Sentence8: Where will you be departing from, and what is your destination? Sentence9: Yes. The 17:21 would be perfect. Please book it for 4 people. Sentence10: Our cheap zero star guesthouse in the north has both free wifi and free parking. Would you like to book? Sentence11: I need a hotel with free wifi. I'm broke, though, so find me a 0-star hole in the wall. Sentence12: Not right now. Thank you. I am also looking for a train that leaves on Monday and arrives by 1830. Sentence13: No, that's all I needed. Thank you. Sentence14: There are three 0 star hotels, both city centre north b and b, and el shaddai are cheap, and cityroomz is moderate. Which would you like? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System