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

Sentence1: I have TR4594, leaving at 11:29 and arriving in 12:07. Is that OK? Sentence2: Yes that works. Can you book it for 5 people and send me the reference number? Sentence3: That sounds perfect, I think that's all I need today. Thanks so much for your help. Sentence4: I need to book a train from bishops stortford to Cambridge on Saturday arriving in Cambridge before 12:30. Sentence5: Yes there is Hobsons house is in the west and has free wifi. Sentence6: Thanks! Can you also check and see what 3-star guesthouses you have? Sentence7: You're welcome, thank you for using our service! Sentence8: We are listing four guest houses. Which area of town are you looking for? Sentence9: Okay. The TR4549 leaves at 21:29. Will that suit? Sentence10: I'm sorry but there are no guesthouses that I can see on the East side of town, can I look in a different location? Sentence11: Okay, I need a hotel for same group of people for two nights starting Friday, and I'll need reference number, please. Sentence12: The east part of town, it should also include free wifi. Sentence13: Ok I have 5 tickets booked on TR4549. Your reference number is NTPYZBY4 . Sentence14: I have successfully booked the hotel for you! Your reference number is NKEKLJ0D . Can I help you with anything else? Sentence15: I actually need to leave after 20:30 on Friday. So whatever is closest to that time will be fine. Sentence16: Yes, are there any 3 star guesthouses in the west that include free wifi? Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User