Teacher:You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? Solve this instance: Sentence1: No, that settles everything. Thanks! Sentence2: I'm leaving the graffiti. Sentence3: Can you get me a taxi that will transport me to scott polar museum by 02:15? Sentence4: You're welcome! Have a good one! Sentence5: I can have a black Honda pick you up, the contact number is 07290394135. Can I do anything else for you today? Sentence6: Where are you departing from? Question: Who has spoken the sentence 4? (A) User (B) System
Student:
Answer: (A) User