You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: The Acorn Guest House matches the criteria you are looking for. Would you like to make reservations? Sentence2: I have 9 entries, all of them are guesthouses. Is that acceptable? Sentence3: I'm sorry but there are no hotels available with those specifications. Would you like to look in a different area? Sentence4: No I am sorry all that are available are guesthouses Sentence5: It doesn't matter where the guesthouse is! I'm sorry, a hotel or guesthouse is absolutely fine, the only thing that matters is free parking, 4 stars, and in the moderate price. Sentence6: Several good choices come to mind, what part of town are you looking to stay in? Sentence7: Yes. Monday, two nights three people. Sentence8: any part but should have free parking and moderately priced. should also be a star of 4 Sentence9: No, sorry I don't. Would you like to try a different area? Sentence10: Do you have any thing that is not a guesthouse in other areas? Sentence11: Do you have any of the guesthouses in the centre? Sentence12: Would you like me to book it for you ? Sentence13: Yes please. There's 3 of us and we want to check in on Monday and stay for just 2 nights Sentence14: I'm looking for a place to stay in Cambridge. Where would you recommend? Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System