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: Ok, that is all the information I need. Thank you. Sentence2: There is a train departing Stevenage at 7:54 Thursday, and arriving in Cambridge at 8:53. Sentence3: Can you tell me how long the trip will take? Sentence4: You're welcome. Thank you for calling the Cambridge TownInfo Centre. Have a great day! Sentence5: The travel time is 49 minutes. Sentence6: I'm looking for a train to take 5me to Cambridge. Sentence7: Okay and when would you like to leave? Sentence8: I would like to leave from Stevenage on Thursday and get to cambridge by 9:15. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System