Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: There isn't a train that leaves at 12:15. The closest one leaves at 13:00 and arrives in London Kings Cross at 13:51. Shall I book it for you? Sentence2: I'll be departing from Cambridge and would like to leave at 12:15. Sentence3: That would be perfect. Book it for 5 people please and send me the reference number. Sentence4: Okay, the booking was successful, the total fee is 94.4 GBP payable at the station . Your reference number is : AJTE5TLW. Is there anything else I can do for you? Sentence5: What area would you like to stay in? Sentence6: I need some help locating a train for Saturday, heading to London King's Cross. Sentence7: Where will you be departing from, and what time would you like to travel? Sentence8: I also need a cheap hotel. Question: Who has spoken the sentence 7? (A) User (B) System
Output:
Answer: (B) System