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: Great! You're booked on TR9187 with reference number MJJ7J6CV . Is there anything else I can help with? Sentence2: The first train leaves at 06:21 and arrives at 08:06. How many tickets would you like please? Sentence3: I'll be happy to book a room for you. How many nights and how many people? Sentence4: Then how about one that is in the cheap price range? Sentence5: Yes! I also need to find an expensive guesthouse in the north. It should have plenty of free parking for my fancy car. Sentence6: Sure! There are plenty of trains going to Leicester. What city will you be departing from? Sentence7: There are 2 options. City Centre north has a rating of 0 stars and Worth House has a rating of 4 stars. Would you like me to book either of them? Sentence8: I would like to go and visit Leicester. Do you think you can help me find a train to get me there? Sentence9: Worth House sounds good. Thank you. Sentence10: I will be leaving from cambridge. Sentence11: Sure,thanks for using this service. Sentence12: Perfect. What day would you like to travel on? Do you need to depart or arrive by a certain time? Sentence13: I will be traveling on Sunday and would like to arrive by 08:30 please. Sentence14: I need it for eight people, please. Sentence15: I actually just needed the information. That's all I need for now. Thank you. Goodbye. Sentence16: I am sorry, there are no expensive guest houses in the north with free parking. Would you like to try another area? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System