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

Sentence1: welcome anytime you need to know about anything Sentence2: Okay, does that place include free wifi and it is 4 stars? Sentence3: Thank you. I also need a train to Kings Lynn that leaves on Sunday. Sentence4: Thank you so much for that information. How many people in your party so I can make the booking for you? Sentence5: There are 19 trains leaving Cambridge on Sunday. When would you like to depart? Sentence6: Alexander bed and breakfast is in the cheap price range in the centre of town. Sentence7: I need 6 tickets, please. Sentence8: No, that will be all. Thank you! Sentence9: I want the train to leave after 16:30. Sentence10: Booking was successful. Your reference number is QIT1W09H . Do you need anything else? Sentence11: I need a list of cheap places to stay that include free parking. Sentence12: Yes, the Alexander has free wifi and is a 4 star hotel. How many nights will you be staying? Sentence13: I will be staying 5 nights starting from Saturday. Sentence14: Yes, can you book it for 6 people? Sentence15: Done! The total fare is 47.04 Pounds, payable at the station, and your reference number is 6CXB3CA2 . Can I help you with anything else? Sentence16: I can put you on the tr8665 with this train you will arrive at 17:58, how many tickets would you like? Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User