You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: If there is anything else you might need please feel free to call back. Enjoy your day! Sentence2: Da vinci pizzeria is the only cheap Italian restaurant in the north, located at 20 Milton Road Chesterton. Would you like to reserve a table? Sentence3: The address is 20 Milton Road Chesterton. The postcode is cb41jy and the phone number is 01223351707. Is there anything else I can help you with? Sentence4: Sure thing where will you be departing from? Sentence5: Train TR9460 leaves Cambridge at 15:36 and would get you to Norwich by 16:55. Would you like me to book for you? Sentence6: I'm looking for something in the north, please! Sentence7: No thanks. Maths isn't my biggest strength so please tell me what the total travel time is. Sentence8: I would like to go to Norwich. Sentence9: I am looking for Italian restaurants in Cambridge in the cheap price range. Sentence10: I'll be happy to help with that. Where would you like to depart from and where would you like to go? Sentence11: Yes, please. I also need a train on Monday, arriving at 17:45. Sentence12: No thanks, I just need the phone number, address, and postcode. Sentence13: We have a few in the north, west, and centre. Do you have a preferred location? Sentence14: I think that is all the info on the train that I needed. Sentence15: I will be leaving cambridge heading to norwich Sentence16: The total travel time is 79 minutes. Can I do anything else for you today? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System