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: thanks for inquiring with us Sentence2: All right sir. I've booked it for eight people. Your reference number is ZN7ZX8O2 . Sentence3: Yes could I please get the phone number? Sentence4: One of my favorites is in the centre part of town and it's a museum called Scott Polar Museum. It is free. Is that of interest to you? Sentence5: Wait...I didn't specify how many people. Can I cancel KPFTA841? Sentence6: Excellent. Can you assist me in booking a ticket? Sentence7: Thank and enjoy ! Sentence8: There is a train leaving Cambridge for Birmingham New Street on Friday at 15:01 for 75.10 pounds. The trip will take 163 minutes. Sentence9: I need it for 8 people Sentence10: Hi, I need a train leaving Cambridge after 14:30. Sentence11: That's all I need today. Sentence12: Can you recommend a fun place to visit while I am in town? Sentence13: Sure - their phone number is 01223336540. Sentence14: Sure, how many tickets do you want? Sentence15: I will. Thanks for your help! Sentence16: Certainly. Your reference number is KPFTA841 . Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System