Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: I found three, one leaving at 21:40, 22:40, and 23:40 which would you like to go? Sentence2: I wish to go to New York City leaving this Friday. Sentence3: You're welcome - safe travels! Sentence4: How about Thai food? Sentence5: Unfortunately no table is available at that time do you have another time? Sentence6: What is your destination and day of travel? Sentence7: Alright, I have you booked at Sala Thong at 12:15. Reference number is: QIH3G407 . Can I help you with anything else? Sentence8: How many people will be dining? Sentence9: No, that should be everything. Thank you very much! Sentence10: I'm sorry, but I can't help you with travel outside of Cambridge and the surrounding areas. Sentence11: The one in the west works please. Can you pleas book it for me on the same day at about 13:15. Sentence12: I would like to book the 21:40 train on Wednesday for one person please. I also need a reference number please. Sentence13: Booking was successful, the total fee is 10.1 GBP payable at the station. Your reference number is : VJ3ZAO4F . Is there anything else I can help you with? Sentence14: I'll be dining alone. Sentence15: Could you please check for a table at 12:15 and can I have the reference number? Sentence16: Ok. How about a train to the Stansted airport? Sentence17: There are 2 restaurants that serve thai food; one in the west and one in the centre. Do you have a location preference? Sentence18: I cannot find any restaurant that serves north african food in the area. Sentence19: Yes, I am also looking to eat some north african food. Can you help me find a restaurant? Sentence20: I want to get a train out of Cambridge that departs after 20:45 please. Question: Who has spoken the sentence 16? (A) User (B) System
A:
Answer: (A) User