Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: That is all I needed, thanks. Sentence2: Don't hesitate to call if you need anything else. Goodbye. Sentence3: you are welcome. have a great day Sentence4: I need a taxi from nusha to thanh binh at 6:15, please. Sentence5: A blue volkswagen will pick you up, and the contact number is 07337359188. Can I help with anything else? Sentence6: Thank you, you too. Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System