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

Sentence1: Can you help me find a train leaving on tuesday departing from cambridge? Sentence2: Yes, the reservation is complete. You can pay 29.4 GBP at the station. The reference number is: GSD9FUA7 . Can I help you further? Sentence3: and where would you like to go ? Sentence4: Train# TR7548 leaves Cambridge at 10:11, arriving in Kings Lynn at 10:58. Would you like me to book your ticket? Sentence5: Good bye, enjoy your day. Sentence6: I would like one with free admission. Sentence7: thanks you very much Sentence8: I am looking for museum type attractions in the centre of town Sentence9: I would like to arrive by 11:45. Sentence10: you welcome and good bye Sentence11: I have found 11 museum attractions. Do you have a preference or would you like me to suggest one? Sentence12: Yes, please make a booking for 3 people. Sentence13: Thank you very much, that is all I'll need. Sentence14: I would like to go to Kings Lynn, please. Sentence15: At what time will you be traveling? Sentence16: primavera has free admission. Their address is 10 king s parade Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System