Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Great! You're booked on TR9187 with reference number MJJ7J6CV . Is there anything else I can help with? Sentence2: The first train leaves at 06:21 and arrives at 08:06. How many tickets would you like please? Sentence3: I'll be happy to book a room for you. How many nights and how many people? Sentence4: Then how about one that is in the cheap price range? Sentence5: Yes! I also need to find an expensive guesthouse in the north. It should have plenty of free parking for my fancy car. Sentence6: Sure! There are plenty of trains going to Leicester. What city will you be departing from? Sentence7: There are 2 options. City Centre north has a rating of 0 stars and Worth House has a rating of 4 stars. Would you like me to book either of them? Sentence8: I would like to go and visit Leicester. Do you think you can help me find a train to get me there? Sentence9: Worth House sounds good. Thank you. Sentence10: I will be leaving from cambridge. Sentence11: Sure,thanks for using this service. Sentence12: Perfect. What day would you like to travel on? Do you need to depart or arrive by a certain time? Sentence13: I will be traveling on Sunday and would like to arrive by 08:30 please. Sentence14: I need it for eight people, please. Sentence15: I actually just needed the information. That's all I need for now. Thank you. Goodbye. Sentence16: I am sorry, there are no expensive guest houses in the north with free parking. Would you like to try another area? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System