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

Sentence1: The phone number is 01223245151. Is there anything else I can help you with? Sentence2: Thank you for your help Sentence3: No, that's all. Thank you! Sentence4: I got injured and I am looking for a hospital nearby Sentence5: Thank you for using our services. Sentence6: I just need the phone number Sentence7: Addenbrookes Hospital is located at Hills Rd, Cambridge. Is there a particular department you're looking for? Sentence8: You're welcome. Please call us if you need anything else. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System