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: what is your price range to narrow down our choices? Sentence2: You're very welcome! Bye now! Sentence3: Nothern European food, please Sentence4: You have come to the right place! What kind of food do you like? Sentence5: Ok. How about just european? Any luck there? Sentence6: No, thank you for your help today Sentence7: The reference number is NMEZYUQT . Can I help you with anything else? Sentence8: I will need two tickets. Sentence9: Yes please reserve a spot and give me the reference number after. Sentence10: What is the booking reference number? Sentence11: I recommend TR3343. It leaves Cambridge at 07:00 and arrives in London Kings Cross by 7:51. Will that work for you? I can reserve a spot? Sentence12: I am planning a trip in Cambridge, Looking for a place to dine Sentence13: I have five restaurants that offer european foods, 3 at the center, 1 on west and that other one on the north. Which are do you prefer? Sentence14: How many tickets will you need? Sentence15: I have booked you 2 tickets. Sentence16: Whichever you recommend. Can I have the phone number, postcode, and address, please? Sentence17: I would like to find a expensive one please. Sentence18: I was unable to find any northern european restaurants Sentence19: Okay. I;m looking for a train that departs from cambridge on tuesday and arrives by 08:00 in london kings cross. Sentence20: I recommend the Eraina. The address is on Free School Lane City Centre, cb23rh. The phone number is 01223368786 Question: Who has spoken the sentence 13? (A) User (B) System
Student:
Answer: (B) System