You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Ok, how about bedouin which serves African food and is in the center of town? Sentence2: I need a restaurant in centre and in the expensive prince range Sentence3: Booking was successful, the total fee is 151.19 GBP payable at the station . Reference number is : 3EF4MBB7 . Sentence4: Your reference number is A69RQEJA . The table will be reserved for 15 minutes. Sentence5: Great. Please go ahead and book it. Sentence6: Sure. I have a number of trains available. what day and time do you prefer? Sentence7: We have a wide variety of restaurants in the centre. Is there a particular type of food that you'd like? Sentence8: You are very welcome. let us know if you need anything else. Sentence9: Yes, please make a booking for 4 people. Sentence10: TR8080 arrives at 13:06, does that work for you? Sentence11: I don't have a preference, I just want to book a table for 4 at 11:15 on Thursday, anywhere is fine. Sentence12: Thanks so much. Good bye! Sentence13: This Thursday, and I would like to arrive by 14:00. Sentence14: I would like to take a train from Cambridge to Leicester. Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System