Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: 4SSOKT22 is your reference number. What else may I do for you? Sentence2: That would be perfect. Could you book it for 1 person and provide me a reference number? Sentence3: Certainly. On what day do you want me to look? Sentence4: I couldn't get you to Norway but Norwich is much more doable. I've got the TR2181 to Norwich leaving at 20:36 with a fare of 17.60GBP. Would that suit you? Sentence5: Okay, have a great time and be safe. Sentence6: on tuesday from cambridge to norway leaving at 2030 hrs Sentence7: I'm looking for a train please. Sentence8: No, thank you. good bye Sentence9: I'm sorry, I meant norwich, not norway. Sentence10: I'm sorry, could you confirm your destination so I can get an accurate schedule. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System