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

Sentence1: Would that be London Liverpool or London Kings Cross? Sentence2: We don't have any trains going from Ely to London Liverpool or London Kings Cross. Do you need anything else? Sentence3: I will be leaving from Ely and going to london. Sentence4: Are you sure you don't have a preference? Sentence5: Either one is fine with me. Sentence6: On Saturday I need a train that will arrive by 21:45. Sentence7: Yes I'm sure. I need to book that for 5 people. Sentence8: Can you tell me where you will be departing from and heading to? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: looking for a train going to Cambridge. Sentence2: How about TR3350 that leaves at 05:17? Sentence3: you can book it. get me the reference number too Sentence4: I am leaving on Sunday and need to arrive by 13:00 Sentence5: Thank you for using our services. Sentence6: Thank you that is all I needed. Sentence7: W8YHJKSV is the reference number Sentence8: What day and time are you wanting to travel? Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: Yes, please book for me now. Sentence2: Hi! I need a place to stay in the centre of town. Sentence3: Expensive price range would be just fine. Sentence4: University Arms Hotel is in the centre and the price range is expensive. Would you like to book a room or get more information? Sentence5: Yes, it does include free wifi and parking. Would you like me to book that now? Sentence6: what day would you like to leave, how many days Sentence7: Before I book can I confirm that it includes free wifi and free parking? Sentence8: I have 3 hotels and 2 guest houses in that area. What is your price range going to be? Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System