Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I have 202 results. Where would you like to arrive? Sentence2: I need it to arrive at Birmingham New Street Sentence3: Unfortunately I wasn't able to book that time for you. Would you like to try for another time or day? Sentence4: I have 15 trains leaving hourly on the :01 from 9:01 to 23:01. The trip duration is 163 minutes. What time would you prefer? Sentence5: Okay there are 19 trains making that trip do you have a time you prefer? Sentence6: Please book for 6 people the train that departs at 9:01. Sentence7: No problem at all! Remember that the Cambridge TownInfo centre is here for all your 411 needs! Sentence8: Clowns Cafe at 54 King Street City Centre would work well for you. Would you like me to book it? Sentence9: Thank you. That was all I needed for today. Thank you very much. Sentence10: Yes, I need a train out of cambridge on Friday. Sentence11: Booking was successful. Reference number is : SUTXD8Y6 . is there anything else I can help with? Sentence12: Sometime after 8:30, please. Sentence13: Yes please. Can you try 19:00 instead? Sentence14: I need 6 tickets please. Sentence15: I want to book a table for 6 people at 20:00 on thursday. Sentence16: I would like to find an Italian restaurant that's expensively priced. Sentence17: I can book you one that leaves at 05:00. How many tickets would you like? Sentence18: I successfully booked you on Train TR3732 for 6 people, total fee of 450.6 GBP. Your reference number is 2ZQNPAPB . Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User