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: I'm finding many trains departing from Cambridge on Tuesday. What is your destination? Sentence2: I need a train that leaves on tuesday and should depart from cambridge. Sentence3: Yes, please! I need 6 seats. Sentence4: Booking was successful, the total fee is 99 GBP payable at the station . Reference number is : NH7GXPVA . Sentence5: I am going to Peterborough and want to arrive by 13:30. Sentence6: Okay great. I'm glad I was able to help you. Sentence7: Thank you so much, that's all I need today. Sentence8: I have a train that departs Cambridge on Tuesday at 12:34 and will get you to Peterborough at 13:24 exactly. Would you like me to book that seat for you? Question: Who has spoken the sentence 3? (A) User (B) System
Student:
Answer: (B) System