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: Unfortunately none of those places exist here. Any other preferences? Sentence2: Thank you, can I please get an address and postal code. Is there an entrance fee that will be charged. Sentence3: There's a fun place called Whale of a Time at unit 8, viking way, bar hill. Sentence4: The address is Unit 8, Viking Way, Bar Hill in postcode cb238el. I'm sorry, I do not know if there is an entrance fee. Do you need anything else? Sentence5: You are welcome! Have fun! Goodbye! Sentence6: Nope, that's all I needed today. I appreciate your help! Sentence7: Hello, I am looking for something to do in the west part of town. It sould involve multiple sports. Sentence8: Hm, can you tell me about what entertainment venues might be on the west side of town instead? Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User