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

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
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
Output: 


Answer: (B) System