Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: That's it for now, thank you so much. Sentence2: Sorry, that booking is unavailable. Perhaps another day or a shorter stay would work for you? Sentence3: There are 24 places available, Acorn Guest House has good ratings Sentence4: I'm looking for a guesthouse to stay in. I don't care about parking, though. Sentence5: Can you suggest another place, is there a hotel with 4 stars in that area? Sentence6: Okay, how about the a and b guest house? If fits everything you need. Sentence7: Yes. I want to book one for 5 people and 2 nights starting from saturday. Sentence8: Actually the A & B Guesthouse just opened up for Saturday. Your reference number is GM77DLR6 . Can I further assist you? Sentence9: Perfect! Let's book it for two nights starting Saturday. There are five people in my party. I will also need the reference number. Sentence10: I'm sorry but there are no 4 star hotels in the east, but there are quite a few 4 star guesthouses. Would one of those interest you? Sentence11: You're welcome, Thank you, goodbye. Sentence12: I ant a place with a rating of at least 4 stars, a guesthouse, in the east, and I don't need free parking. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System