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

Sentence1: Great. Thank you very much for your help today. That will be all. Sentence2: Of course, Addenbrookes Hospital is at Hills Rd, Cambridge, postcode CB20QQ. Sentence3: You're welcome, have a great day. Sentence4: Does the Addenbrookes Hospital have a psychiatry department? Sentence5: No, thanks but can you pass on the address and postcode please? Sentence6: Yes it does. The phone number for the psychiatry department is 01223596102. Would you like to book an appointment? Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System