Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: You're welcome. The centre is here to help. Goodbye. Sentence2: Thank you goodbye Sentence3: Addenbrookes Hospital is located at Hills Rd, Cambridge. Is there a particular department you'd like the phone number for? Sentence4: Am looking for the Addenbrookes Hospital Sentence5: You're welcome. Let me give you the hospital's main phone number, which is 01223245151. Sentence6: That is all, thank you. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User