Teacher:You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? Solve this instance: Sentence1: There are many trains available. TR5173 leaves at 08:21 and arrives at 10:06. Would you like me to book that for you? Sentence2: I need to go to leicester from cambridge, and i need to leave on sunday. Sentence3: OK I booked that for you. The total fee is 90.72 GBP and your Reference number is : AVE1068H . Sentence4: Okay thank you for calling. Sentence5: Thanks so much. I appreciate the help. Have a nice day. Sentence6: Great can I get TR5173 booked for 3 people please? Sentence7: I need to find a train departing from Cambridge that arrives at 18:00 Sentence8: What are the other requests? Question: Who has spoken the sentence 4? (A) User (B) System
Student:
Answer: (A) User