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

Sentence1: I need the train to arrive to arrive by 13:45. There will be 3 of us. Can I get a reference number? Sentence2: I have successfully booked your train reservation. The total fee is 13.2 GBP, payable at the station. Reference number is UHK3WFOA . Is there anything else I can help you with today? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : JWEROL3K . Is there anything else you need? Sentence4: Okay, in that case, can you recommend something else in the centre that is moderately priced? Sentence5: Yes please make a booking for 3 people at 19:45 on friday. Sentence6: I don't see any restaurants matching your criteria. Do you have any other criteria I can search for? Sentence7: That is all I needed today, thank you. Sentence8: TR0212 leaves Ely at 11:35 and arrives in Cambridge at 11:52. Will this work for you? Sentence9: I have 5 would you like m to recommend one? Sentence10: Yes, that would be great! Sentence11: Have a nice day. Sentence12: You should try the the copper kettle at 4 Kings Parade City Centre. Would you like me to make a reservation for you there? Sentence13: Yes, I need a train on the same day from ely to cambridge. Sentence14: Unfortunately, there are no restaurants meeting your criteria. Sentence15: yes and thank you that will be all Sentence16: What time would you like to leave or arrive in cambridge on friday? Sentence17: Can you suggest any local restaurants in the centre that serve fusion food? Thanks. Sentence18: Can I help you with anything else today? Sentence19: Can you check for british food instead? Sentence20: Can you book the 3 of us tickets? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System