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: No, just the area and postcode please. Sentence2: Price range is not important, just the four stars. Sentence3: Yes, it has free internet. Would you like me to book it for you? Sentence4: As long as it has free parking, that's all I really need. Can you recommend one and tell me a little about it? Sentence5: Thank for calling today. Goodbye! Sentence6: It does not matter but I would like free parking. Sentence7: Nope. That's all. Goodbye. Sentence8: What price range would you like? Sentence9: I'm leaving Cambridge and headed to Ely. Sentence10: I have several guesthouses with 4 star ratings. Is there a particular area you'd like to be in? Sentence11: Where are you departing from and what is your destination? Sentence12: I am also looking for a guesthouse with a rating of 4 stars. Sentence13: it is in the north area and the post code is cb41da. would you like to make a booking? Sentence14: There is a train to Ely that leaves at 17:50 on Monday. Would you like me to book it? Sentence15: No, thanks. I'm not ready to book at this time. Sentence16: What area of town would you like? Sentence17: No, I just need the train ID and arrival time. Sentence18: I have 5 guesthouses with free parking. I recommend the Acorn Guest House in 154 Chesterton Road, postcode cb41da. Sentence19: Sure the train id is TR4294 and the arrival time is 18:07. Sentence20: Can i help you with anything else today? Sentence21: Does it have free internet? Sentence22: I'm looking for a train that leaves on monday after 16:15. Any suggestions? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System