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

Ex Input:
Sentence1: Not in that criteria, perhaps another area or price range? Sentence2: I'm booking you a table for 5 at 11:00 Saturday at Charlie Chan. What name should I place this under? Sentence3: I want to eat chinese food in the centre. Sentence4: Yes, please try J Restaurant. Asian Oriental food sounds good. Sentence5: I was able to book you into the J restaurant and your reference number is 87G7FWZM . Sentence6: Thank you for your help! That will be all. Good Bye. Sentence7: Booking was unsuccessful. Would you like to find another restaurant? Sentence8: I don't know what I was thinking earlier, we actually have a lot of cheap restaurants in the centre. J Restaurant serves Asian Oriental. Should we try that? Sentence9: How about Charlie Chan? It is a cheap chinese restaurant in the centre. Sentence10: You're welcome, have a great day! Sentence11: Are there any in the same area and price range but not Chinese? Sentence12: Sure. I would like to book a table for 5 people at 11:00 on Saturday. Sentence13: Are there any other cheap restaurants in the area? Sentence14: Book it for XXXX, can I please get a reference number? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Does it have four stars? Sentence2: Not yet, but can you tell me what time the train arrives in Ely please? Sentence3: acorn guest house is located in 154 chesterton road should i book it for you? Sentence4: I would like to leave on Tuesday after 18:00. Sentence5: It arrives by 20:07! Anything else love? Sentence6: TR5511 leaves Cambridge for Ely at 20.07. Do you need tickets? Sentence7: I've booked your stay at the Acorn Guest House, and your reference number is IT07BRTC . Sentence8: The trip will last 17 minutes. Is there anything else you would like to know? Sentence9: Do you know what day or time you want to leave? Sentence10: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence11: I need some lodging accommodations. It needs to have free parking and Internet please! Sentence12: I would like someone to book me a place with free parking and internet. Sentence13: That should do it. Thanks so much for your help! Sentence14: I found 29 hotels matching your request. What price range and area of town would you prefer? Sentence15: Thanks a lot. Can you also help me find a train going to Ely? Sentence16: Yes. Please book it for 2 people for 4 nights starting Friday. Sentence17: Yes it does. Shall I book? Sentence18: What is the total travel time on that time? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: You're very welcome! Have a great day! Sentence2: It will be for 16:45 on tuesday. Sentence3: I need to go between the hotel and the restaurant. Arriving by the booked time, please. Sentence4: Booking completed! Booked car type : grey skoda Contact number : 07990098942 Sentence5: I need that in the north please. Sentence6: Yes could you please make those reservations? Sentence7: does it have free parking ? Sentence8: I'm hoping you can help me find a guesthouse. Parking is optional. Sentence9: In that case I would recommend the Bridge Guest House, it has a 3 star rating and offers both free WiFi and free parking. Would you like to book it? Sentence10: Also I need to find an expensive chinese restaurant book the table for 3 at 16:45 on tuesday Sentence11: Okay, I can help with that. What is your departure site and destination? Also, when would you like to leave or arrive by? Sentence12: Is there a particular part of town you would like to go to? Sentence13: Thank you, it has been a pleasure assisting you today. Enjoy your trip. Goodbye Sentence14: There are 3 people in the group. Sentence15: Any type that you have available. Sentence16: Can I have the price range and phone number? Sentence17: I need a hotel that has free parking Sentence18: which type hotel do you want? Sentence19: It has a 4 star rating and does provide internet. Would you like a reservation? Sentence20: Yes, please. I need a taxi. Sentence21: I have 2 chinese restaurants in the north, the hakka and the hotpot, both expensive. Phone number is 0122568988 and 01223366552 respectively. Would you like me to book reservations for you? Sentence22: Your booking for Hakka was completed successfully, reference number PM03Z53S . Can I help you with anything else? Sentence23: a and b guest house is a nice one. Do you want to book ? Sentence24: How many people are in your party? Sentence25: What day and time would you like the booking for? Sentence26: Thank you, same to you. Sentence27: Does it have a 3 star rating? I'm also needing free wifi on this trip. Thanks for helping me. Sentence28: Parking is not included but internet is, do you want to book or search for something else? Sentence29: The price range is moderate and the phone number is 01223247942. Sentence30: Thank you so much. That is all I need today. Question: Who has spoken the sentence 28? (A) User (B) System

Ex Output:
Answer: (A) User