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: Um, give me a minute please Sentence2: Hi I am in the north looking for a place to stay. I'd prefer a hotel with 4 stars. Any suggestions? Sentence3: Great, thank you. I am looking for some sort of entertainment in the Centre, maybe a park. Can you help me with that? Sentence4: I can I've found botanic gardens in the centre area postcode is cb21jf and has an entrance fee of 4 pounds. will there be anything else? Sentence5: That is all, thank you for your help. Sentence6: ok thanks it is a pleasure to serve you Sentence7: No, the attraction and the hotel was everything. Sentence8: Do you need a taxi between the guesthouse and the park? I can handle that, also. Sentence9: Ok, let me know whenever you're ready. Sentence10: Yes, please. I need the reservation for 1 person for 5 nights starting on Wednesday. Sentence11: Your booking was successful for 5 days at Archway House starting on Wednesday. Your reference number is UAUOPOBP . Sentence12: The Archway House is a guesthouse in the north with four stars. It's moderately priced and includes wifi and parking. Should I book? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System