Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Hey there. I think I need a vacation asap. You think you can help me find a 4-star hotel somewhere? Sentence2: The the total fee is 53.7 GBP. Have a great day! Sentence3: I have no preference but I need it for 3 nights starting on Friday for 3 people. Sentence4: What is your destination that day? Also is there a certain time you would like to arrive or depart by? Sentence5: It should arrive by 8:30. Sentence6: The number is SPRQBYFB, is there anything else you need? Sentence7: We have 21 places that meet your request, do you know if you want a guesthouse or a hotel? Sentence8: I would like to stay in a hotel and it should be in the east. Sentence9: The booking was unsuccessful would you like another day or shorter stay? Sentence10: I was able to book you at a and b guest house. Your reference number is QGABNRTX . Can I help you with anything else? Sentence11: That's it for now. Thanks for all your help. Great service. Good bye. Sentence12: I have no hotels in the east. Would you like to try another area? Sentence13: How about 2 nights? Sentence14: Please book the 6:32 train for 3 people and please provide me the reference number Sentence15: I want to depart from broxbourne. Could I get a reference number please? Sentence16: How about a guesthouse? Sentence17: So you want to arrive in Cambridge by 8:30? Can you tell me where you'll be coming from? Sentence18: There are two choices, one arrives 6:32 and the second one arrives at 7:32. Which one would you like and how many tickets do you need? Sentence19: There are 6 guesthouses available. Do you have a price range in mind? Sentence20: I'm looking for a train on the same day as my hotel booking. Question: Who has spoken the sentence 16? (A) User (B) System
Output:
Answer: (A) User