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

Ex Input:
Sentence1: Ok great! I was able to get you booked, your reference number is N4TJE8VR . Is there anything else that I can help you with? Sentence2: Yes please. There are 5 of us total and we need 4 nights in a row. Thank you. Sentence3: May I get your departure and destination information please? Sentence4: Can you verify the cost for train TR6954 for me? Sentence5: There don't seem to be any 5-star lodgings in the city. Would you like to try searching for 4 stars instead? Sentence6: I am looking for a train arriving by 9:45 on Tuesday. Sentence7: I'd like to start my stay on Tuesday, please. Sentence8: Your booking reference is NT43PSC0 . Now, if you let me know what type of hotel you are interested in, I can help you with that as well. Sentence9: TR6954 departs from Leicester at 07:09 and arrives in Cambridge at 08:54. Would you like to book this train? Sentence10: What day would like to start your stay? Sentence11: Maybe... how much does it cost? Sentence12: Yes, 4 stars would be fine. Sentence13: Nope, that'll take care of everything, thanks! Sentence14: I am going from Cambridge to Leicester. Sentence15: I'm sorry, we have that mixed up. I need to depart from leicester and go to cambridge. Do you have a train that arrives by 09:45 in cambridge? Sentence16: The acorn guest house is a 4 star hotel located in the north side. Would you like to make reservations? Sentence17: You're welcome. Have a great stay! Sentence18: TR2863 departs from Cambridge at 07:21 and arrive in Leicester by 09:06. Would you like to book this train? Sentence19: Yes I would like help with booking the train and I will also need to book a hotel. Sentence20: It costs 37.80 pounds per ticket. Sentence21: The cost for this particular train is 37.80 pounds per ticket. Would you like assistance booking tickets for this train? Sentence22: Can you help me find a 5-star room somewhere that offers free parking and wifi? Question: Who has spoken the sentence 17? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: It is free admission into the King's college. Sure I can help with that. What is your price range? Sentence2: There is pizza express it's moderately priced, would you like more information or for me to book it for you? Sentence3: That was all I needed, thank you. Sentence4: I was able to book your table. The Reference number is : WA5JKA4G . Is there anything else you needed? Sentence5: Yes. Do you know what their entrance fee is? Also, I need some help finding an Italian restaurant in the centre area. Sentence6: I don't have a price range preference. Sentence7: Thank you! Sentence8: I also need a taxi to travel between King's College and the restaurant. Sentence9: Yes please. I would like the reservation for Thursday at 15:00 for 2 people. Sentence10: I am looking for King's College. Sentence11: May I help you with any thing else? Sentence12: thanks for using our services and welcome anytime Sentence13: Booking completed! Booked car type : blue tesla Contact number : 07982639539 Sentence14: Yes, King's College is in the centre and located on King's Parade. Their phone number is 01223331100. Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: Okay. I don't care if it is a hotel or guest house, but it needs to be expensive, 4 stars, and in the centre. Sentence2: I would like moderate pricing and 4 stars please Sentence3: I am still having issues finding a hotel for you, would you please restate your criteria one more time? Sentence4: Its been such a pleasure talking to someone as polite and eloquent as you, enjoy your day. Sentence5: There are 11. What kind of museum would you like to visit? Sentence6: I want some entertainment in the centre. What do you have? Sentence7: No need to book it, just give me the address please Sentence8: I'm sorry, there is not anything in the centre. There are some venues in all of the other areas though. Do you have a second preference? Sentence9: Could you just pick one for me? Sentence10: How about castle galleries? Sentence11: Sounds interesting. What is their address with postcode? Is it free? Sentence12: The address for the University Arms Hotel is Regent Street. Sentence13: Okay thank you I won't be needing any more from you today. Goodbye Sentence14: Type does not matter. Please try the search again without type specified Sentence15: I found the University Arms Hotel, would you like me to book it for you? Sentence16: Sorry, no places matching that query. Would you like to change your area, type, star rating, or price range? Sentence17: Is that 4 stars and in the moderate price range? Sentence18: I need a place to stay. Can you suggest a hotel in the centre of town? Sentence19: Of course, there are three hotels in the centre. Do you have any particular needs? Sentence20: It is 4 stars in the expensive price range. They also have parking and wifi. Would you like me to book this? Sentence21: Are there any musems in centre? Sentence22: It is free! The address is unit su43, grande arcade, saint andrews street cb23bj Do you need anything else? Question: Who has spoken the sentence 21? (A) User (B) System

Ex Output:

Answer: (B) System