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: I need to arrive by 16:15. Sentence2: Okay. A red lexus will pick you up. They can be reached at 07101377388. Did you need anything else? Sentence3: Sure! when would you like to arrive? Sentence4: I think that is all I need, thank you! Sentence5: You are more than welcome! Sentence6: I need a taxi at Peking Restaurant to take me to Royal Standard. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System