Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Yes. Could you give me the Train ID? Sentence2: Can I get a train to Cambridge on Friday? Sentence3: No, that should be all. Thank you for all your help. Sentence4: The phone number is 01223307030 and the postcode is cb58aq. Can I help you with anything else? Sentence5: You are very welcome. Travel safely! Sentence6: There is a depature at london kings cross at 7:17 am. Sentence7: Can I please have the phone number and postcode? Sentence8: I need to find a cheap modern European restaurant. Sentence9: There is a restaurant called the river bar steakhouse and grill that fits that criteria. It is located in the city centre. Sentence10: Yes, there is a train that departs at 13:09, arriving in Cambridge at 14:54. Would that work for you? Sentence11: Actually, I need to depart from leicester after 12:15. Sentence12: The train ID for that one is TR4625. Can I help you with more? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System