Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: There are 10 trains going to Cambridge from Ely on Monday. Is there a certain time you would like to depart by? Sentence2: Yes, thanks, I am also looking for a train. I'd like to leave on monday, heading to cambridge. Sentence3: thank you get for that. i will give them a call. Sentence4: So TR4724 leaves at 23:35 and arrives at 23:52 correct? If so that would be fine. Sentence5: Contact information for Fitzbillies Restaurant is telephone number 01223352500 Sentence6: Can I have the contact information for the Fitzbillies Restaurant. Sentence7: The travel time is 17 minutes. Will that be okay? Sentence8: I would like to depart from ely. Sentence9: That is correct. How many tickets will you need? Sentence10: What would the price be for that train? Sentence11: Train TR4724 is fine. What is the travel time? Sentence12: I can go ahead and book on my own, thanks. Thank you for the info. That was all I needed for today. Sentence13: Can I help you with anything else? Sentence14: Yes, I'd like to depart any time after 21:45. Do any trains fit that time frame? If so, could I have the train ID, travel time, and when it will arrive? Sentence15: Correction I apologize TR4724 leaves at 23:35 and arrives by 23:52. It's price is 4.40 pounds by the way. Let's find one leaving after 21:45. Sentence16: There is one train leaving after 21:45 on monday. It is TR4724, leaving at 23:52 for a duration of 17 minutes, arriving at 23:52. Sentence17: You're welcome. Good-bye. Sentence18: There are over 202 trains that arrive in cambridge on monday. Might I help find the best train by asking where you wish to depart from? Question: Who has spoken the sentence 16? (A) User (B) System
Output:
Answer: (A) User