Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: I am looking for a train going to cambridge. Sentence2: Do you have a time you'd like to leave by? Sentence3: yes, please. I need the price and travel time. Sentence4: I would like to leave Broxbourne on Tuesday. Sentence5: That is for TR8361? Sentence6: Yes. TR8361 is 17.90 pounds. Would you like to buy a ticket? Sentence7: Sure, where are you departing from and what day? Sentence8: Your confirmation number is BAMJW6M2 . May I help you with anything else? Sentence9: I think you've answered all of my questions! Thank you so much! Sentence10: Not a problem. Have a good time! Sentence11: I'd just like to arrive by 16:45 please. Sentence12: TR8361 will arrive in cambridge by 16:32 on Tuesday, does this suit your needs? Sentence13: Thank you for your help. Sentence14: Yes I would like a ticket for one. Sentence15: You're welcome. Call us again when you need to. We're always here! Sentence16: The price is 17.90 pounds. The train leaves at 15:32 making the travel time one hour exactly. Is there anything else? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System