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 am sorry, but that hotel does not have a 4 star rating, would you like another option? Sentence2: Booking was successful for the royal standard. The table will be reserved for 15 minutes. Your reference number is : 4W94X4GE . Is there anything else I can help with? Sentence3: Yes, I am looking for a gastropub near the hotel. Sentence4: Great! I think that's all I need today. Thank you for you help! Sentence5: How about Royal Standard? It's a gastropub located at 290 Mill Road City Centre Sentence6: express by holiday inn cambridge meets your criteria. Sentence7: I've booked you a taxi from "a and b guest house" to "royal standard." The car is a blue audi and the Contact number is 07009978153. Sentence8: Thank you I also need a taxi between the two places please to get to the restaurant by 11:45 Sentence9: Great, you're booked with reference number Y5Z7GN2R . Anything else I can help you with? Sentence10: Is there a 4 star guesthouse in the east? Sentence11: Can I book one of them for 8 people for 4 nights starting tuesday and get the reference number? Sentence12: Excellent. One more thing: is that in the expensive price range? Sentence13: there are 5 four star guesthouses in the east Sentence14: Yes, royal standard is an expensive gastropub. Sentence15: Does it have 4 stars? Sentence16: Terrific. Can you book a table for the same group of people at 11:45 on the same day and provide me with the reference number? Sentence17: Thank you for using our service. Please contact us again if we can be of further assistance. Sentence18: I would like to stay at a hotel in the east, please. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System