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 need a place to stay with free wifi but I don't need free parking, thank you. Sentence2: Yes, let's go ahead and book with the Avalon. Sentence3: Thank you. I am also looking for a place to eat in the centre area and that serves indonesian food. Sentence4: how about lebanese instead? Sentence5: There's actually a great Lebanese restaurant in that area, Ali Baba. Would you like me to book a table for you? Sentence6: Yes, book the table for two. Also, make it a late dinner? Sentence7: It doesn't matter as long as it's on the moderate range. Sentence8: Ok. The booking was successful and your reference number is C35XS6YE . Sentence9: I'm afraid that I didn't find any restaurants matching your criteria. Would you like to try a different type of cuisine, or a different part of town? Sentence10: Okay, I will book the table for two at a moderate restaurant. Sentence11: are there any indonesian restaurants elsewhere? Sentence12: 9 of the 10 results returned are guesthouses. What area of town would you like to stay in? Sentence13: Do you have a preference for location? I'm showing guesthouses everywhere but the city centre. Sentence14: There are none in town. Shall I try another type of food? Sentence15: I just need to find one that has room for 3 people to stay 3 nights starting from Saturday. Sentence16: Do you have any in the cheap price range? Sentence17: I am showing 2 guesthouse and 1 hotel. All are moderate price range. Would you like more information? Sentence18: the avalon is available,, would you like to book now? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System