You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Ex Input:
Sentence1: We have 13 trains meeting your criteria. Do you have any idea how early you want to leave? The first train leaves at 11:32 and then every hour after that Sentence2: Are there any cheap options in the centre of town? Sentence3: We can take care of that too, but let's get your restaurant squared away first - in order to provide an address I'll need to know what type of cuisine? Sentence4: Whichever one you think is best please. Sentence5: to cambridge from broxbourne. i need to leave after 11:15 please Sentence6: Where will you travel too and from? Sentence7: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence8: excellent. I will need the train booked for 5 as well. Sentence9: It has been booked. You reference number is UCICW103 . Sentence10: I recommend the Dojo Noodle Bar. They're located at 40210 Millers Yard, City Centre. Sentence11: I will be traveling on Sunday. Sentence12: Hi. Can you help me find a restaurant? Sentence13: and what day will you be traveling on? Sentence14: The train should leave broxbourne after 11:15 so the 11:32 is a good choice. There are 5 of us traveling together. Please book. Sentence15: There are a lot of options in Cambridge. Can you please be more specific? Sentence16: Yes, there are chinese, asian oriental, indian, italian, spanish, portuguese, modern europe, and mediterranean available. Sentence17: Great. Thank you so much. Sentence18: Can I have the address? I am also looking for a train that leaves on Sunday to Cambridge. Question: Who has spoken the sentence 16? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: kohinoor. i want to book a table for 2 people at 16:45 on Thursday Sentence2: Nope, I'm all finished for today. Thanks so much, goodbye now! Sentence3: Sure. Booking was successful. The table will be reserved for 15 minutes. Reference number is : X9AVZ8EI . Can I help with anything else today? Sentence4: Absolutely. What is the name of the restaraunt you are interested in? Sentence5: You are very welcome, bye! Sentence6: I need to find some information in a particular restaurant. Are you able to look up a specific place? Sentence7: I also need a Thursday train. Sentence8: Depart from Ely and would like to arrive by 13:00 in Cambridge. I need to book it for 2 people I also need a reference number. Thanks Sentence9: What location will you depart from and where are you headed? Sentence10: Sure thing, it's booked and your reference number is PWSVK4XQ . Do you need more help? Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: I have the varsity and the bloomsbury restaurants when would you like to book Sentence2: How about one that serves international food? Sentence3: Nothing else for today. Thank you. Sentence4: No problem! I have a table booked for you. Your reference number is KFUNWVWH . What else can I do for you? Sentence5: Train ID please and thank you Sentence6: I would like to book at Varsity for 5 people around 20:45 on the same day I arrive. Sentence7: I need to arrive in Cambridge by 17:15 please. Sentence8: I need to catch a train in Broxbourne on Wednesday. Sentence9: What time would you like to leave Broxbourne? Sentence10: Thank you I also would like a place to eat in the centre that serves afternoon tea food. Sentence11: There is a train arriving in Cambridge by 7:32. Sentence12: No record match your search, can I try anything else? Sentence13: Have a good day! Sentence14: I'd suggest TR5972, it departs at 15:32 arrives by 16:32. It costs 17.90 pounds per ticket. Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:

Answer: (B) System