You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Can you give me their phone number please? Sentence2: I need a train to cambridge that will get me there by 20:30. Sentence3: Actually, yes. Can you help me locate a college to visit? Sentence4: No, that won't be necessary. I do need the departure time, and travel time though. Sentence5: Yes, their number is 01223336233. Is that all for you today? Sentence6: Alright, where will you be departing from? Sentence7: That's everything thanks. Sentence8: The train should depart from bishops stortford and leave on Thursday. Sentence9: Ok perfect! I have TR0060 which will arrive by 20:07. Would you like me to book this for you? Sentence10: Churchill college is in the west part of town. Sentence11: You are very welcome! I hope you have a fantastic time and enjoy your day! Sentence12: TR0060 will depart Bishops Stortford at 19:29, and it will take 38 minutes for your trip. Is there anything else I can help you with today? Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System