Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: Yes. I'd also like their phone number please. Sentence2: I would be happy to book TR2021 for you. The cost is 8.08 a ticket. How many tickets will you need? Sentence3: Would you like to book don pasquale pizzeria? It matches all of your latest criteria. Sentence4: Don Pasquale Pizzeria's phone number is 01223350106, what date, time, and number of people would you like to book? Sentence5: I'm looking for a restaurant the serves austrian food in the centre. Sentence6: Should I book this train for you? Sentence7: The 20:24 train from stansted arrives in cambridge at 20:52. It's a quick, 28-minute trip! Sentence8: I'm sorry, but no restaurants match your criteria. Would you like to broaden your search? Sentence9: You're welcome. Feel free to contact us again if you need any more information. Sentence10: There are 4 trains available one leaves at 20:24 would that work for you? Sentence11: Actually I need a train on Sunday, please. Sentence12: What about something in the expensive price range? Sentence13: The arrival time for TR2021 is 20:52. Sentence14: I will just need the arrival time please. Sentence15: What is the arrival time in Cambridge? Sentence16: That's actually all I need this afternoon. Thank you very much. Sentence17: The first train leaves from stansted airport on friday at 20:24. Would you like me to book it for you? Sentence18: Please book that train for me. Sentence19: What is the name of the stop where I need to get off for the restaurant? Sentence20: There are 33 expensive restaurants in the center of town, but no austrian ones. In fact, there are no austrian restaurants in all of cambridge. Sentence21: the train stop is cambridge. Sentence22: Ok, how about an expensive Italian restaurant around the centre? Sentence23: Alright, I have the earliest on Sunday leaving at 20:24 from Stansted Airport. Should I book this train for you? Sentence24: That's all the info I need on the pizzeria. I also need a train to leave after 20:15 and depart from stansted airport. Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System