You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: What day will you take the train? Sentence2: I will be going to cambridge and I can arrive whenever. Sentence3: I'd like to know the location of Clare Hall. Sentence4: enjoy your stay in Cambridge! Sentence5: Can I also get the phone number please? Sentence6: Do you have clare hall's address? Sentence7: Claire Hall is located on herschel road in the west side of town. Do you need more information? Sentence8: The TR5703 meets your criteria. Would you like to book tickets? Sentence9: That'll be all for today, thank you. Sentence10: Sure, where will you be going to, and on what day? Sentence11: Sure. Clare Hall is on Herschel Road. Sentence12: I will be leaving Ely on Sunday. Sentence13: Yes please, for 3 people Sentence14: Booking was successful, the total fee is 10.56 GBP payable at the station . Reference number is : TDBKS2EJ . Can i help with anything else today? Sentence15: Yes, I am looking for a train that leaves Ely and arrives by 16:30. Sentence16: Sure, their phone number is 01223332360. Anything else? Question: Who has spoken the sentence 9? (A) User (B) System
A:
Answer: (B) System