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

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
Answer: (B) System

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
Answer: (A) User

Sentence1: Hi, I've just started planning a trip and the train system is so confusing, can you help me? Sentence2: anytime after 13:00 Sentence3: Stansted Airport. And I'm headed to Cambridge. Sentence4: The trainID is TR4096 for the train departing the stansted airport and going to Cambridge on Monday. It will arrive at 17:52. Sentence5: Absolutely. Where will you be departing from? Sentence6: At what time do you want to leave ? Sentence7: I don't need it booked, just please forward me the train ID and arrival time. Sentence8: What day will you travel on? Sentence9: We have one on Monday at 5:24,would you like me to book it for you ? Sentence10: I'll be travelling on Monday. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User