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: Thank you that is all I need. Sentence2: I want to find a guesthouse place to stay with a 3 star rating. Sentence3: Any area is fine I just need info for anyplace where a booking is available. Sentence4: I'll need to arrive by 09:30. Sentence5: Can I cancel the reservation with you? Sentence6: Yes I need it for 3 people for 5 nights starting from Monday. Sentence7: All right, I'm glad that I could be of help! Sentence8: We have 3 trains that match that criteria. One leaves at 05:01, another at 06:01 and another at 23:01. Which one would you like me to book for you? Sentence9: I cannot cancel the reservation but you can call to do so at 01223365664. Sentence10: May I ask what day you would be traveling? And where are you wanting to go to? Sentence11: That arrives at 08:44, which means you'd have about 45 minutes before 09:30. Will that work for you? Sentence12: I also need a train. Leaving from Cambridge. Sentence13: Can I get your booking information so I can check them for availability? Sentence14: The Hamilton Lodge has availability. I went ahead and booked that stay for you. I can always cancel if you change your mind. Your reference number is XFD6ZAFT . Sentence15: That sounds perfect. I need that for 3 people. Sentence16: I would like to leave on Wednesday and I'm going to Birmingham New Street. Sentence17: There are four to choose from. Do you prefer the north, south, or west? Sentence18: Booking was successful, the total fee is 225.3 GBP payable at the station .Reference number is : SEX3RXHL . Sentence19: what time does the one that leaves at 06:01 arrive in birmingham new street? Sentence20: what about TR1773? it leaves at 09:01 Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User