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

Ex Input:
Sentence1: Could you look again for places that serve North American food in the West. Sentence2: I have 4 trains that meet your needs. Would you like to book tickets? Sentence3: Great! I also need to have some north american food in the west part of town. Sentence4: I am looking for information in Cambridge. Sentence5: Booking was successful, the total fee is 8.8 GBP payable at the station . Reference number is : 8BUQLIK8 . Sentence6: Great that was all I needed today, thank you Sentence7: How about an intalian restaurnat in the west area? Sentence8: You are booked the reference number is 3ICEL34F, can I help with anything else? Sentence9: I have two. One is moderately priced, and one is cheap. Do you have a preference? Sentence10: I'm sorry, we don't have any north american restaurants in the west area. Would you like to try a different type of food? Sentence11: What type of information are you looking for? I can helpp with dining, hotels and entertainment. Sentence12: You're very welcome! Have a great day. Sentence13: The moderately priced one will be fine. I'll need it booked for the same day, same people, and at 10:15. Sentence14: book for 2 people and get me the reference number Sentence15: The only north american restaurant in the city is in the centre. Would you like more information about that? Sentence16: I need a train on friday going to ely from cambridge arrival by 13:00 Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Great, have a wonderful day and enjoy your taxi ride, thank you! Sentence2: What time would you like to arrive? Sentence3: No, that is all I need today. Thanks! Sentence4: i want to book a taxi. The taxi should depart from la Margarita and should go to riverboat Georgina. Sentence5: I have a white tesla booked. The contact number is 07032807056. Anything else today? Sentence6: I would like to arrive by 17:15. Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: I need a train departing from london liverpool street. Sentence2: I will need it on Friday and intend to arrive by 12:00. Sentence3: Thanks. Thats all I needed. Goodbye. Sentence4: ballare has a 5 pound entrance fee. Sentence5: Thank you for choosing the Cambridge TownInfo Centere. I hope you use us again. Sentence6: I would like to travel on Friday. Sentence7: The TR0637 will get you into Cambrdige by 11:07. Will that work for you? Sentence8: I'm trying to find a nightclub in the centre of town. Sentence9: Sure, I can help you with that. What day were you wanting to travel? Sentence10: may i have the train ID and price please ? Sentence11: What day and time would you like to travel? Sentence12: You already have the Train ID from previous conversations, but the price is 16.60 pounds. Sentence13: Could you give me a recommendation as well as the entrance fee? Sentence14: We have 5 nightclubs located in the centre of town. Are you looking for a particular nightclub or do you want a recommendation? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User