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

Sentence1: I do not care about the area but I would like it to be expensive. Sentence2: How about the Gonville Hotel which is centrally located? It has internet and is expensive. Sentence3: I found 5 hotels matching your request. I would recommend Huntingdon Marriott Hotel located in the west. It has a 4 star rating. Sentence4: Will you be needing a reference number? Sentence5: On what day will you be checking in? Sentence6: 4 people will be staying Sentence7: I also need a place to stay? Sentence8: Your table will be reserved for 15 minutes. Your reference number is GDZZ5T1Y . Can I assist you further? Sentence9: That is all, thanks. Sentence10: Booking was successful. Reference number is : M6FRXJOV . Sentence11: I have many to choose from. Do you have a preference for internet or parking? Sentence12: Alright! How many people will be staying starting what day? Sentence13: There are 11 European style restaurants. What price ranges are you looking for? Sentence14: Yes, I would like it to have internet. Sentence15: That sounds perfect. Let's book it. Sentence16: There are 33 hotels to choose from. Can we narrow this down? Are you interested in a particular part of town or specific price range? Sentence17: Expensive price range. Please book it for 4 people at 18:15 on Monday Sentence18: Can you help me find some european food in Cambridge? Sentence19: How about price range? The hotel should also be very expensive. I won't settle for less and neither will Fi-Fi. Sentence20: I will be staying on Monday. Sentence21: Yes I will definitely need that. Sentence22: Great. If you need help in the future, please contact us. Enjoy your stay. Question: Who has spoken the sentence 16? (A) User (B) System
Answer: (A) User

Sentence1: How about Italian food instead and could I have the phone number if you find a restaurant Sentence2: There are no matching restaurants. Would you like me to perform another search? Sentence3: Prezzo is a moderately priced Italian restaurant in the west side of town. The phone number is 01799 521260. Sentence4: Thank you, goodbye. Sentence5: West side of town. Sentence6: Thank you good bye Sentence7: I want a restaurant with corsica food please. Sentence8: What is the area you would like? Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Oh they really are lovely. And the number is 01223464646. Sentence2: That sounds lovely. What's their phone number? Sentence3: I was able to book the table for eight on Tuesday 11:00. The reference number is R8O6B9DF . The table will be reserved for 15 minutes. Sentence4: I'm looking for places to go in town. Can you search in the area of south? Sentence5: Thank you for using our service. Have a great day! Goodbye. Sentence6: We only have one listing for an Italian restaurant in the south. It's located at Cambridge Leisure Park Clifton Way Cherry Hinton. Does this interest you? Sentence7: Thank you so much. You took care of everything. Thanks. Bye. Sentence8: I was able to book a black honda contact number is 07790378961 Sentence9: Thank you. I am also looking for an expensive Italian restaurant. Sentence10: Absolutely! When would you like to arrive at or leave by? Sentence11: We have several great options. The Byard Art museum is popular and has free admission. Sentence12: I'd like to get to the restaurant by my reservation time. Sentence13: I'd like one near the museum in the south. Sentence14: Yes. I need a table for 8 at 11:00 on Tuesday. Sentence15: Thank you, can I also get a taxi between the two places? Sentence16: Sure, there are 5 expensive Italian restaurants for you to choose from. Is that a specific area you would like the restaurant to be in? Question: Who has spoken the sentence 4? (A) User (B) System

Answer: (A) User