You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Are there any hotels that offer both free parking and free wifi? Sentence2: Great, thanks! That is all for now. Sentence3: I need it to be in the cheap range. Thanks for helping me with this! Sentence4: Almost every place in Cambridge meets those requirements! Do you have an area or price range in mind? Sentence5: May I just get their phone number please. I am also going to need a taxi. Sentence6: You're very welcome. We have ten great, inexpensive guesthouses spread throughout Cambridge, such as our Alexander Bed & Breakfast which is rated 4 stars. Sentence7: Glad to help. Enjoy your visit. Sentence8: Yes of course, the Shanghai Family Restaurant is located in the centre of town, would you like me to book it for you? Sentence9: I am also looking for the Shanghai family restaurant Sentence10: That sounds great. I would like to book that for 8 people and 4 nights starting from Tuesday. Sentence11: Booking was successful. Reference number is : IQ8WDOKB . Is there anything more I can help you with? Sentence12: I've booked a black honda for you. The contact number is 07084963980. What else would you like today? Sentence13: I want to leave the hotel at 11:15 and go to the restaurant. Please give me car type and contact number too. Sentence14: Their phone number is 01223301761. Where are you headed in your taxi? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System