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: Yes, that would be great. I will be there for three nights. Sentence2: So glad I could be of assistance. Have a lovely day! Sentence3: We arrive on Monday and stay for 3 nights, there are 7 of us. Sentence4: dojo noodle bar would be perfect for you. Shall i book it ? Sentence5: Actually I want a restaurant that serves food in the type of the americas Sentence6: A black volkswagen is booked for you. The contact number is 07101354106. Anything else today, or will that be all? Sentence7: How many people and from what day will you stay? Sentence8: Thanks for all of your help today you have been wonderful! Sentence9: I need to find a place to stay in the centre of town. Sentence10: There are no cheap restaurants in the centre of town serving cheap food from the Americas. Wild you like to try a different area or cuisine? Sentence11: Yes please. Also, I'd like to get a taxi and leave the hotel at 14:30. Could you get me the contact number and car type? Sentence12: Perfect. Alexander Bed and Breakfast is a cheap guesthouse in the center with free internet and parking. Can I book it for you? Sentence13: I need to find a place to eat as well. Sentence14: Booking was successful. Reference number is : DHS86PO0 . Can I help with anything else today? Sentence15: I'd like a cheap guest house with wifi. Sentence16: Do you have a price range? Sentence17: I would love to help you with that. Do you have anything specific in mind? Area? Price range? Sentence18: Nandos City Centre is a cheap place to eat and is in centre. Can I book it for you? Sentence19: I am looking for the same area and price range as the guesthouse -- centre and cheap. Sentence20: Sure, how about Portuguese? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System