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: Your booking was successful, the total fee is 14.32 GBP payable at the station. Your reference number is 4YAT8PVP . Sentence2: Does that depart from broxbourne station? Sentence3: The price is 14.32 pounds per person. Sentence4: I'm glad I could help you. Goodbye. Sentence5: I would prefer to leave after 13:45 please Sentence6: Alright, I have train TR4813 that leaves Sunday at 14:32 from Broxbourne. Will this work better for you? Sentence7: I will do so... and you too. Sentence8: the train id is TR5219 and it leaves london kings on friday Sentence9: Is there a certain time of day you would like to travel? Sentence10: Sorry. I need to narrow down the 133 trains from Broxbourne to Cambridge. First, what day do you want to leave? Sentence11: Thank you, I will buy a ticket for 14.32 pounds for train TR4813 leaving Sunday at 14:32. Sentence12: Yes as long as it is going to cambridge that sounds fine. I'll need the price also please. Sentence13: I'm looking for a train going to cambridge please. Sentence14: thanks for inquiring with us. have a nice day Sentence15: Thank you so much, have a wonderful day. Sentence16: I want to leave on sunday Question: Who has spoken the sentence 15? (A) User (B) System
Student:
Answer: (B) System