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

Sentence1: I would also like to find out if there are any museums located in the centre of town. Sentence2: Sure the phone number and address for Castle Galleries are 01223307402 and unit su43, grande arcade, saint andrews street. Sentence3: The closest train meeting you requirements will arrive in Stansted at 17:08. Would you like me to book that for you? Sentence4: We have many trains going to Cambridge, Where are you departing from? Sentence5: May I have the phone number and address for Castle Galleries? Sentence6: The train departs at 17:40 duration 28 minutes price 10.10 pounds. Sentence7: I'm happy to be of service. Enjoy your stay in Cambridge! Sentence8: That works. May I get the departure time, travel time, and price for that as well? Sentence9: No, no fee it is free entrance. Is there anything else I can help you with? Sentence10: No, thank you, that is all. Sentence11: I show 11 results for museums in the centre, all free entrance. To name a few there is castle galleries, primavera, ruskin gallery. Would you like more information? Sentence12: Is there an entrance fee? Sentence13: I need a train to Cambridge that will arrive by 18:03 and leaving on Friday. Sentence14: Depart from Cambridge and go to Stansted Airport Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System