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

Sentence1: Can you help me find a place to eat called sala thong? Sentence2: The train is TR0032, it departs at 10:09 and travel time is 105 minutes. How many tickets do you need? Sentence3: I'm sorry, there's nothing available at that time. Could you perhaps do a different time? Sentence4: As for now, just one please. Sentence5: That's everything. Thanks! Sentence6: Please make a booking for people at 19:00 on monday. I also need a reference number once booked. Sentence7: Well, I'm also looking for train on Monday departing from Leicester to Cambridge arriving by 12:45. Sentence8: Booking was successful, the total fee is 37.79 GBP payable at the station. Reference number is : 3KP0ATIS . Anything else I can help you with? Sentence9: I have a train that arrives at 11:54. Would you like me to book that for you? Sentence10: That was unsuccessful as well, do you have another time? Sentence11: Absolutely! They are a great thai restaurant in the west of town. They are located at 35 Newnham Road, Newnham. Did you need help reserving a table or any other info? Sentence12: Sure, try a time that would work. Maybe 20:00? Sentence13: My pleasure. Please call again if there is anything we can do to help. Sentence14: Yes I also need the train id, departure time and travel time. Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System