You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Yes. Please book for 2 people. Sentence2: Your passage has been booked. 16.16 GPB will be payable at the station and your reference number is ZVFTQ0X3 . Will that be all? Sentence3: Can I please book a train to bishops stortford on saturday? Sentence4: Does the Kirkwood House include free parking? Sentence5: I don't care about price. It needs to be in the north, however. Sentence6: I'd like to leave Cambridge and arrive by 17:30. Sentence7: We have many guesthouses located in the north, many of which are 4 stars. May I recommend the Kirkwood House located in the north for a moderate price with 4 stars? Sentence8: Where would you like to depart from? Sentence9: I have the TR0121 train available. It departs from Cambridge at 15:29 and arrives at Bishops Stortford at 16:07. Would you like to book a ticket? Sentence10: Yes it most certainly does. Sentence11: May I ask a price range that you would like? Sentence12: Thank you. I also need help finding a place to stay. I'd prefer a guesthouse with free wifi Question: Who has spoken the sentence 10? (A) User (B) System
A:
Answer: (A) User