Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Thanks for letting me assist you today. Have a great time! Sentence2: that is it for today, thank you Sentence3: I need a different time. I want to arrive by 05:30. Sentence4: Alright. The type of car is a white lexus and the contact number is 07607179806. Anything else? Sentence5: Yes of course, from where will you be leaving? Sentence6: i want to book a taxi. Sentence7: I have ordered one for you their pick up time is 1:00pm. Is this time okay or do you need a different time? Sentence8: From museum of classical archaeology to london kings cross train station, please Question: Who has spoken the sentence 7? (A) User (B) System
Output:
Answer: (B) System