Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I am so sorry but the panahar is fully booked. My I find another restaurant for you that serves Indian food? Sentence2: Yes, please make a reservation for 6 people at Panahar on Sunday at 13:00. Sentence3: Okay. I was able to get you into the Golden Curry instead. Your reference number is OXKPJH2R . Sentence4: I am looking for a place to dine that serves indian food and is located close to the centre, can you help me please? Sentence5: Yes please, in the same area and price range, please. Sentence6: May I have the reference number for the reservation? Sentence7: You are booked at Panahar on Sunday at 13:00 for 6 people. Is there anything else I can help you with? Sentence8: We have nine Indian restaurants in the centre, with prices ranging from cheap to expensive. Do you have a preference? Sentence9: You are so welcome. Sentence10: I would like a restaurant in the expensive range. Sentence11: Thank you so much. Have a great day. Sentence12: There are several. Would you like to book a table to Panahar, or perhaps one of the others? Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System