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

Ex Input:
Sentence1: I have your taxi booked. Look for a blue volkswagen, contact number 07655267463. Is there anything else I can help you with? Sentence2: I need to book a place to stay with a star of 4. I don't need free parking. Sentence3: Can you please provide me with the address, telephone number and the cost of admission. Sentence4: Thank you. Enjoy your stay Sentence5: I now need a taxi to get to the church from the hotel. I would like to leave the hotel by 15:45. Can you book that for me? Sentence6: I don't care about location, just would like a moderate price with 4 stars please. Sentence7: We have 44 attractions in the centre of town Broughton House Gallery is a museum we have available. Sentence8: We have 11 in the moderate range. They are all a guesthouse accommodation. Would you like one of these? Sentence9: I need one with free wi-fi. Sentence10: I have you booked. The reference number is WPGQ4ADJ . Sentence11: After that I'm also going to need the reference number. Sentence12: OK, now can you tell me about some of the attractions in the center of town? Sentence13: I would also need to book it for 4 nights. Sentence14: No, that is all. Thanks so much. Bye. Sentence15: One person, and I'd like to arrive on Tuesday. Sentence16: We have over 20 fine hotels. Do you have any preferences of cost or location? Sentence17: How long do you want to stay? Sentence18: Can i book one on tuesday? Sentence19: OK, let me see what I can do. Sentence20: How about All Saint's Church at 01223452587 in the centre? It's free. Sentence21: before I look for that, could you let me know how many people are staying and what day you'd like to arrive? Sentence22: I have two: a and b guesthouse in the east and avalon in the north. Would one of these work for you? Question: Who has spoken the sentence 18? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
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

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: I am wanting to go to Cambridge. Sentence2: No preference. Can you recommend one & book a table for 4 people at 17:45 on saturday. & may I have the reference # please? Sentence3: I am looking for an expensive restaurant in the centre city. Sentence4: What will your destination be? Sentence5: I'm looking for a train leaving on Saturday from Kings Lynn. Sentence6: I need to leave after 13:00. Sentence7: Do you have any time preferences? Sentence8: That would be fine. Is it available Saturday at 17:45? Sentence9: The restaurant Fitzbillies is available, and I've made you a reservation. Your reference number is 4WGDGOSA . Sentence10: I have several restaurants in the centre in the expensive range. What type of cuisine would your prefer? Sentence11: I would recommend british cuisine. Would that be okay with you? Sentence12: The TR1499 leaves at 17:11. Can I book some tickets for you? Sentence13: It was my pleasure to serve you. Please contact us again if you need any more assistance. Have a good day. Sentence14: You're reference number is BIAZMBUC . Is there anything else I can help you with? Sentence15: Yes book for 4 people Sentence16: Thank you for your help, have a nice day. Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:

Answer: (A) User