Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Problem:Sentence1: The TR3685 leaves just 15 minutes later, at 13:00. Sentence2: You're welcome! Have a great day. Goodbye. Sentence3: I'll be leaving on friday after 12:45. Sentence4: I am looking for a train. Sentence5: I'd be happy to help you with that. Can you tell me your departure location and where you are headed to? Sentence6: I am looking to go to london kings cross and depart from cambridge. Sentence7: There are 70 trains making that trip, do you have a day or time? Sentence8: That sounds great. I'll get back to you when I decide on the booking. Have a nice day. Bye. Question: Who has spoken the sentence 4? (A) User (B) System
Solution:
Answer: (A) User