Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: The booking was successful. Your table will be reserved for 15 minutes. Your reference number is : 3MC54ZYM . Is there anything else I can do for you? Sentence2: There's two places that match your criteria. One is indian food and the other is italian. Would you like the address of either? Sentence3: Actually, let me get more information first. What is the travel time and price? Sentence4: I am traveling to Cambridge on Saturday. Sentence5: Did you want me to reserve the train for you? Sentence6: Can you book it for me and get a reference number ? Sentence7: Yes I can. Please tell me where you're departing from and what day and time and I'll get you some options. Sentence8: Ok! The restaurant is called Da Vinci Pizzeria and the address is 20 Milton Road Chesterton with postcode CB41JY. Would you like to reserve a table? Sentence9: I'll be happy to assist with that, how many tickets would you like me to book? Sentence10: Yes, I'm also looking for a train that will depart from Peterborough. Can you help me with that? Sentence11: I would love to know the address of the Italian place please, that sounds perfect! Sentence12: Leaving peterborough and must arrive at least by 12:15, I'll need to book a table then too Sentence13: TR8494 leaves peterborough saturday at 11:19 and arrives in Cambridge at 12:09. Would you like me to book passage for you? Sentence14: No that is everything, thanks for your help. Sentence15: Thank you. That is all that I need. Sentence16: Where are you heading to from Peterborough? Sentence17: I am in the north part of town, can you tell me what cheap restaurants are around? Sentence18: Yes I would, I need it for Saturday for 5 people at 18:00 please. Sentence19: Travel time is 50 minutes, and the price is 13.20 pounds. Sentence20: You are welcome, enjoy your stay. Question: Who has spoken the sentence 16? (A) User (B) System
Answer: (A) User