Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: What is the train id of the one arriving closest to 13:00? Sentence2: Only me so so just one Sentence3: The address for the midsummer house restaurant is Midsummer Common, the post code is cb41ha and their phone number is 01223369299. Would you like me to book a reservation? Sentence4: I have you booked on TR5170 with reference number KH6HKQ4X . Unfortunately, I have no Vietnamese restaurants in the centre. Would you like to try another type of food or area? Sentence5: Well, that depends on where you're going and the day you're traveling. Do you have that information? Sentence6: TR5170 is arriving by 11:51, that is the closest time to 13:00 that is showing available. Would you like to book a ticket? Sentence7: So happy I could help you today. Thank you for using the Cambridge Towninfo centre. Have a great day! Sentence8: What trains will leave from cambrige and arrive by 13:00? Sentence9: There are four trains that meet those criteria. They leave at 5, 7, 9, and 11 and arrive 51 minutes after departure. Would you like me to book one for you? Sentence10: In British restaurants you have three choices: Fitzbillies, the Midsummer House, and the Cambridge Chop House. Sentence11: Ok, how about an expensive british restaurant? Sentence12: I need to get your London Kings Cross on Saturday. Sentence13: Yes. I am also looking for a Vietnamese restaurant in the centre Sentence14: How many will be traveling? Sentence15: Could you please send me the address, postcode and phone for the Midsummer House? Sentence16: No, thank you. I can book it later. I think thats all I need for today. Thanks. Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User