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

Ex Input:
Sentence1: What day are you travelling? Sentence2: You are very welcome. Enjoy your day too. Bye. Sentence3: I'd like to book 3 tickets on the train arriving at 19:08, please. And would it be possible to have a reference number for the booking? Sentence4: I will need to leave from Cambridge if that's ok Sentence5: I have a train that arrives earlier at 18:08 and one that arrives just before your specified time at 19:08. Sentence6: Sure. Where will you be leaving from? Sentence7: I was wondering if you could help me in finding a train to the airport. Sentence8: OK, you have 3 tickets reserved on TR4447, departing Cambridge at 18:40, arriving Stansted at 19:08. Total fee is 30.29 GBP. Reference #5VRJSMSE . Will that be all today? Sentence9: Yes, it will. Thanks so much. Have a nice day. Sentence10: On Wednesday. I need the train to arrive by 19:15. Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: It's a hotel. There are 5 guesthouses in the area. Do you prefer cheap or moderate for the price range? Sentence2: I want to go from cambridge to ely, no preference for time but I need to book for 8 people. Sentence3: Great. Can you help me with a train as well? I'm looking to come in from Ely. Sentence4: What is your destination? And do you have any preference for day, departure or arrival time? Sentence5: There are 5 guesthouses that have free parking. Should I book one of them for you? Sentence6: There are trains that run every two hours every day starting at 5:50. Do you know what day you'd like to travel? Sentence7: Okay, none of them DON'T offer free wifi? If not, I'll need the address for one that does have wifi, please. Tell me about your favorite. Sentence8: no, but it should have free parking, please. Sentence9: Thank you and enjoy your visit. Have a great day. Sentence10: The price doesn't really matter. I just need free parking. It doesn't really need to have internet though. Sentence11: The allenbell is a guesthouse on the east. The addres sis 517a coldham lane post code cb13js. Sentence12: There are no hotels that do not have internet, but 7 which do have it. Do you have a specific price range you'd prefer? Sentence13: Is that a guesthouse or a hotel? I'd really prefer a guesthouse. Sentence14: Hi. I'm looking for a hotel in the east. The internet is not needed. Sentence15: The Express by Holiday Inn Cambridge is in the area and has free parking, would you like more information? Sentence16: No, I don't need anything else right now. Thank you for your assistance. Good Bye. Sentence17: I'm looking for Wednesday , arrive by 11:30 for 8 people Please. Sentence18: Booking was successful, the total fee is 35.2 GBP payable at the station. You reference number is 7ZCVR4Q3 . Can I help you with anything else? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: It is in the north area. Would you like a reservation? Sentence2: No that's all. Thank you. Goodbye. Sentence3: You're welcome, can I help you with anything else? Sentence4: What part of the city is that in? Sentence5: I need to double check, does it include wifi? Sentence6: I'm also looking for a guesthouse in the east with 4 stars and free parking, is there a place like that available to stay at? Sentence7: The Allenbell, Leverton House, and Autumn House are inexpensive 4 star guesthouses offering free parking. I have two others that are moderately priced. Do you have a preference? Sentence8: Yes it includes wifi, would you like to me to book your reservation? Sentence9: That's all I need for now. Thank You very much! Sentence10: Wonderful! The address of the hotpot is 66 Chesterton Road Chesterton, and their telephone number is 01223366552. I can help you get a taxi there if you like. Sentence11: Thank you! Do you know what the price range is at the hotpot? Sentence12: It's an expensive restaurant. Sentence13: Thank you for contacting the Cambridge TownInfo Centre. Have a great day. Sentence14: I'll take the Allenbell. It's in the east right? Sentence15: Hi, I am looking for a restaurant called the hotspot. Sentence16: Yes, Allenbell is in the east, at 517A Coldham Lane. It is very affordable. Would you like to set up a booking? Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:

Answer: (B) System