Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: How about the Oak Bistro? It's a British restaurant in the centre, also moderately priced. Sentence2: How about a restaurant that serves gastropub food in the centre instead? Sentence3: I am sorry there are no listings, would there be another area I can search for you? Sentence4: I have 3 restaurants. Two are expensive and one is moderate. Would you like me to book one for you? Sentence5: No, that's all I needed. Have a nice day. Sentence6: Yes, can you see if the moderately priced one can accommodate a party of five at 16:45 on Sunday? Sentence7: Your booking was successful. Your booking number was 13HISQU8 . Can I assist you with anything else today? Sentence8: It can not, I am sorry. Shall I try another? Sentence9: Can I get another restaurant in the centre that is moderately priced? Sentence10: I have to book a place to eat that serves irish food and is located in the centre, can you help me? Sentence11: Thank you, you have a good day too. Sentence12: That sounds amazing. Please try to book that for me. Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System