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: There are 8 hotels available with internet and parking. What price range and area of the city are you interested in? Sentence2: Yes please, for 3 people. We'll need 3 nights starting Friday. Can you please give me the reference number once it's booked? Sentence3: It's my pleasure. Have a good day. Sentence4: from broxbourne to cambridge Sentence5: Great, you have been very helpful today. Thanks. That is all I need. Bye. Sentence6: The arrival time is 13:32. The train ID is TR3158. And the travel time for this route is 60 minutes. Anything else I can do for you? Sentence7: I also need to find a hotel with free parking and wifi. Sentence8: Sure, what's the departure and destination. Sentence9: Your room has been booked. Reference number is 77BQDD6I . Sentence10: The TR3158 meets your description. Would you like to make a booking? Sentence11: There are 16 options available. Can I narrow it down for you by price range? Sentence12: The price doesn't matter. Is there one that you would recommend? Sentence13: Can you help me find a train leaving after 12:15 on friday? Sentence14: I want to to have a 4 star rating & be a guesthouse. It can be in any area of the town. Sentence15: What is the arrival time? I'll also need the travel time and train ID. Sentence16: I would recommend the Allenbell which is in the center and cheap. Would you like to make a reservation there? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User