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

Example 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
Example Output: Answer: (B) System

Example Input: Sentence1: I'll take whichever one you recommend. I just need the phone number, postcode & address please. Sentence2: TR7786 will leave at 17:00, would that work for you? Sentence3: The travel time is 51 minutes. Can I help you with anything else? Sentence4: What time would you like to depart. I have anything from 5:00 to 23:00 Sentence5: Hello, can you help me find a train going to London Kings Cross? Sentence6: You're very welcome! I hope that you enjoy your time here! Thank you for contacting the Cambridge TownInfo centre. Sentence7: There are 3 restaurants that match what you're looking for, would you like me to book one for you? Sentence8: I would recommend the Ghandi. They are located at 72 Regent Street City Centre and can be reached at 01223353942, can I assist with anything else? Sentence9: I think that's everything I need. Thank you very much. Sentence10: Can I get the travel time for that as well? Sentence11: On Monday, from Cambridge. Sentence12: Yes, I apologize but can you give me the arrival time for train TR7786? Sentence13: Yes, please. Is there a restaurant with Indian food? Sentence14: Sure I can. The arrival time for that train is 17:51. Is there anything else I can do for you? Sentence15: I'd like to leave after 15:45, please. Sentence16: I want a cheap swedish restaurant in the centre, please. Sentence17: Sure! What day are you planning on leaving? Sentence18: I wasn't able to find a cheap swedish restaurant in the centre of time. Would you like me to try a different type of food? Question: Who has spoken the sentence 17? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: The train should leave after 15:30 and should go to peterborough. Sentence2: There are several trains that fit your requirements. Is there a specific time you'd like to arrive? Sentence3: Train ID TR9561 Price 16.50 pounds Reference number is : YYF3B1A5 . Sentence4: Ok great, thanks for the help. Sentence5: Thank you so much for calling. Goodbye now! Sentence6: That's a lot. I am going to Peterborough. Sentence7: No, I can arrive at anytime. Sentence8: Looking for atrain leaving on Tuesday to Cambridge. Sentence9: You are quite welcome. Do you need any further assistance? Sentence10: No, that is all. Good bye. Sentence11: I found 202 trains matching your request. Where is your destination? Sentence12: Are you wanting to arrive in Peterborough by a certain time? Question: Who has spoken the sentence 6? (A) User (B) System
Example Output:
Answer: (A) User