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

Sentence1: May I ask you for more information regarding the train? Sentence2: I'll be going to London Liverpool street on Sunday. Sentence3: TR2141 leaves Cambridge on Sunday at 13:59 and arrives at London Liverpool Street at 15:57. Are you interested in me booking this for you? Sentence4: Can you pick one and get me the postcode, address on phone number? Sentence5: I also need a train departing from cambridge and should leave after 12:30. Sentence6: Any specific area in mind? Sentence7: There are several colleges in the centre where you can hang out. Most of them have free entrance fees. Is there anything else I can help you with? Sentence8: Yes, that sounds ideal. Will you please book for 8 passengers, please. Sentence9: I need to find a place to hang out at a college in Cambridge. Sentence10: No thank you, you have been helpful. Sentence11: I recommend downing college located on regent street. The postcode is cb21dq and their phone number is 01223334860. Anything else I can help you with? Sentence12: Your train has been booked. The total fee is 106.24 GBP payable at the station. Your reference number is ZAPBD0P6 . Can I assist you any further? Sentence13: In the centre would be great! Sentence14: I'm happy to hear that. Thank you for using the Cambridge TownInfo centre. Have a wonderful day. Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System