You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Any one will do as long as it has a 4-star rating with free wifi and is cheap. Sentence2: Hi, I'm looking for a 4-star hotel with free wifi. Sentence3: No I am sorry, they are both in the moderate price range. Would you like to book one of them? Sentence4: Okay, I've made your reservation. The reference number is 525A3U0N . What else can I help you with today? Sentence5: I'm not sure. I really needed those specifications. Sentence6: I apologize, we have several options. The alexander bed and breakfast is a cheap four star guesthouse, in the north area, with wifi. Would you care to reserve a room? Sentence7: Are either of those two cheap? Sentence8: You've taken care of everything. Thank you. Sentence9: Sure thing. I have two options for you, and they are both guesthouses. One in the east, and one in the north. Do you have a preference? Sentence10: Yes, let's book it for 3 nights from Wednesday. There will be 5 of us. Sentence11: Thank you have a good day. Sentence12: There are no 4-star places that are cheap and have free wifi. Perhaps something not as fancy, or in a higher price range? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System