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

Sentence1: Telephone number is 01223245151 and the Postcode is CB20QQ. Is there anything else I can help you with? Sentence2: Thank you, that is all I need today. Sentence3: I've been injured and I need a hospital. Where is the nearest one? Sentence4: Addenbrookes Hospital is closest, located on Hills Rd, Cambridge Sentence5: The general phone number and postcode also please. Sentence6: Happy to help! Hope you feel better soon! Sentence7: Thank you for your help Sentence8: Do you want the hospital telephone number or a specific department? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System