Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: That's exactly what I needed. Thank you. Goodbye! Sentence2: Little saint mary's church is an architecture site, their address is little saint mary's lane, and postcode is cb21qy, and the phone number is 01223366202 Sentence3: I am looking for places to see in town. Can you help me? Sentence4: The TR6906 departs at 23:21 and arrives at 24:10. Would you like me to book it for you? Sentence5: I just need the price on that one please. Sentence6: The price is 12.80 pounds Sentence7: Cambridge offers many attractions. Is there a certain part of town or type of attraction you'd like to narrow your search down to? Sentence8: Have a great trip. Goodbye. Sentence9: I'm leaving from Cambridge going to stevenage. Sentence10: what is your destination. Sentence11: Thank you. I'm also looking for a train that leaves on Monday. It will need to leave after 21:45. Sentence12: I really don't have a preference. I'll let you pick! I'll need the address, postcode and the phone number. Thanks so much! Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System