You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: No, thank you. Sentence2: thank you, goodbye. Sentence3: Any type of food is fine, just need to know where it is located. Sentence4: What type of food are you looking for? Sentence5: chiquito restaurant bar serves mexican food in the expensive price range and in south. it is located at 2G cambridge leisure park cherry hinton road cherry hinton. Is there anything else I can help you with? Sentence6: Goodbye. Sentence7: Thank you for calling and please use our system again. Goodbye. Sentence8: I want to find an expensive restaurant in the south part of town. What is the address? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User