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, should I book for 6 people? Sentence2: Can you book it for 6 people for 2 nights starting Friday? Sentence3: Any area, really. But also free internet if possible! Sentence4: I have your reservation for 6 people starting friday and staying 2 nights, your reference number is XELL9B9J . Can I help with anything else? Sentence5: Yes, I also need a train from cambridge to Ely. Sentence6: They all have free wifi! I recommend the Allenbell guesthouse in the east. Sentence7: I do not need to book it, all I needed was that info today, thanks. Sentence8: You're welcome. Have a great time! Sentence9: You're in luck, I have 10 results that match that description! What area of town are you looking for? Sentence10: I have train TR1159 leaving at 11:50 and arrive 12:07. WOuld you like to book that? Sentence11: I need a hotel in the lower price range that includes free parking. Sentence12: I'd like to leave after 10:15 on Sunday. Sentence13: What day did you want to travel and did you have a time you preferred to leave? Sentence14: yes please book it. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System