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: sure i have 5 options for you Sentence2: Perfect, thanks so much for your help today, that's everything I needed. Sentence3: I want to find a cheap Italian restaurant. Can you help me out? Sentence4: You are welcome. Have a great day. Sentence5: Okay, pick one for me please. It should be in the west. Sentence6: Your table is booked, reference #YTAMNAAO . Can I help you with anything else today? Sentence7: No thank you. Not at this time. Sentence8: the cambridge belfry has 4 stars and you can call them at 01954714600 Sentence9: I found The Cambridge Belfry, would you like me to book it for you? Sentence10: Hold on. I also need a hotel. Can you help? Something in the same price range and area as the restaurant. Sentence11: You are welcome. If I can be of any other assistance, don't hesitate to ask. Sentence12: Okay, that leaves one option, and that's the La Margherita. Would you like for me to book a reservation for you? Sentence13: Yes, please. Can you reserve a table for 1 on Sunday at 19:30 please? Sentence14: How many stars is it and can you give me the phone number? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User