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

Ex Input:
Sentence1: We have nine expensive dining establishments on the west side. Cuisines offered are Thai, Indian, European, and British. Do you have a preference? Sentence2: Thank you. Can you please give me the reference number? Sentence3: The reference number is 5WHDPGHW .. Is there anything else I can assist you with? Sentence4: Okay I booked a table for 4 at 15:00 on Saturday at the Graffiti, an expensive British restaurant in the west area of town. Sentence5: I am interested at eating at an expensive place in the west part of town. Sentence6: No that will be all. Thank you so much for all of your help! Sentence7: Excellent. Have a good rest of your day! Sentence8: No I don't have a preference. I want to book for four people at 15:00 on Saturday. Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Thank you for the help, have a nice day. Sentence2: Hi, kohinoor is a cheap Indian restaurant, but doesn't specify that it is South Indian. Would you like the phone number? Sentence3: There are 8 trains that will arrive by 21:45. What time would you like to depart? Sentence4: how about 17:00. Sentence5: Great! I am also looking for a train that leaves on thursday and departs from cambridge. Sentence6: Hi, I'm looking for a place to eat, preferably a cheap South Indian restaurant. Sentence7: How many tickets do you need? Sentence8: Yes, that would be great. Could I get a reference number please? Sentence9: Is it in the centre of the city? Sentence10: Would you like for me to book a table at Kohinoor for you? Sentence11: What's the last train to arrive by 21:45? Sentence12: Yes, it is indeed in the centre. The phone number is 01223323639 Sentence13: Destination is Stevenage. I would like to arrive by 21:45. Can you book the train for me as well? Sentence14: It would be the one leaving at 19:21 and arriving at 20:10. Shall I book it? Sentence15: I need 1 ticket. Sentence16: Booking was successful, the total fee is 12.8 GBP payable at the station . Reference number is : 5TM8STAM . Sentence17: What is your destination? Sentence18: Yes, please. 18:00 on Wednesday for just myself. Sentence19: I'm sorry, they're all booked up at that time. Would you like to try a different time? Sentence20: It was a pleasure to serve you have a great day Sentence21: I was able to book that, your reference number is HEJFVRPP . Sentence22: Ok, thank you. Question: Who has spoken the sentence 9? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Archway house does have free parking, would you like me to book it for you? Sentence2: Great, how about the Archway House? It's in the North, moderate price, and 4 stars. It also has internet. Sentence3: No, that's it. Thank you! Sentence4: The postcode to Archway House is cb43pe and the phone is 01223575314. Would you like me to book this for you? Sentence5: Not at the moment. What is the postcode? Sentence6: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence7: There are 15 results for guesthouses in the moderate price range, what area are you looking to stay in? Sentence8: I would love to book a taxi to commute between the two places. I want to leave the attraction by 08:45. I need contact number and car type please. Sentence9: I am looking for a college type attraction. Sentence10: A blue BMW will pick you up, contact number 07646838374. Is there anything else I can help you with? Sentence11: Sure. There are a number of college attractions to visit. Is there a specific place or area of the city you were interested in? Sentence12: none. just recommend one and let me know its entry fee. Sentence13: How about king's college? It's in the centre of town and the admission is free. You can contact them at 01223331100. Sentence14: The area doesn't matter, but I would like 4 stars, please. Sentence15: do they also have free parking? Sentence16: Great! I also need a moderate priced guesthouse. Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User