You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Your very welcome! Enjoy your stay! Sentence2: I'm sorry, but they don't have a room for that long. Would you like to shorten your stay? Sentence3: Great! That worked and your confirmation code is 4MI69WKV . Sentence4: Sure and I would like the address also. Thanks Sentence5: I need booking information,how many people,what day,and how many days you would like to stay. Sentence6: The arbury does have 4 stars. It is moderate priced. Would you like that one? Sentence7: You are welcome. If you need anything in the future, please let us know. Sentence8: Excellent! Now, what can you tell me about the Da Vinci Pizzeria? Sentence9: Have a great day! Thank you for your help! Sentence10: Sure, let's try 2 nights instead. Sentence11: No, that's all I need today. Thanks for all your help! Sentence12: Yes please that sounds good. Sentence13: Oh, wait, I don't think I completed the booking at Da Vinci Pizzeria we were talking about. If you'd still like it I'll need a time, day, and number of people. Sentence14: I am looking to stay for 1 person, 4 nights, starting wednesday. Sentence15: No that's ok. I just needed the address, no booking. Thank you! Sentence16: The Arbury lodge guesthouse should work out for you. Sentence17: It is located at 20 Milton Road Chesterton and offers Italian food at low cost. Would you like me to make a booking? Sentence18: Hi, I'm actually looking to stay at a luxury guesthouse. Sentence19: does it have a rating of 4 stars? Sentence20: Absolutely, I have made the booking and the address is 20 Milton Road in Chesterton. Is there anything else I can help you with? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System

Sentence1: Yes, please. I need to book the train for 8 people. Sentence2: enjoy your stay in cambridge! Sentence3: TR2125 leaves a 09:01 and arrives by 10:01. Would you like a ticket? Sentence4: Thanks! I also need a train to Broxbourne on Thursday. Sentence5: I'm looking for places to go watch entertainment. Sentence6: Fantastic, thank you very much. I don't need anything further today! Sentence7: There are 5 entertainment venues in Cambridge. Do you have an area in mind? Sentence8: There are quite a few options. Do you have a preference for departure or arrival time? Sentence9: I don't mind the area. can I get the address to one of them? Sentence10: Yes I was able to book that for you and your reservation number is 648C0A9S . Sentence11: Yes, I want to depart from Cambridge any time after 8:30. Sentence12: The Funky Fun House is amazing. I think you'll love it. Their address is 8 Mercers Row, Industrial Estate. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Happy to be of service, and thanks for using the Cambridge TownInfo centre! Sentence2: Yes, Cityroomz does have free wifi. Is there anything else I can help you with? Sentence3: Yes I was interested in European food in expensive price range Sentence4: Their phone number is 01223368786. Is their anything else I may assist you with? Sentence5: Eraina is a great european restaurant in the centre of town. It's located at Free School Lane City Centre. Would you like their phone number? Sentence6: That's all I needed today, thank you. Sentence7: I would like more information on a hotel called cityroomz for my trip to Cambridge. Sentence8: I also would like information on a place to eat in the centre of town. Sentence9: Yes please, I would like their phone number. Sentence10: No, I just need to know if they have free internet. Sentence11: Cityroomz is a moderate priced accommodation, located in the city centre, on Station Road. May I assist with a booking? Sentence12: I can definitely help you with that. Was there a specific type of cuisine you were interested in? Question: Who has spoken the sentence 8? (A) User (B) System

Answer: (A) User