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: The east would be great. Sentence2: Can you search for hotels instead of a guesthouse? Sentence3: Yes, it has free parking. Would you like me to book that for you? Sentence4: Great, thank you and goodbye! Sentence5: Yes, can you please tell me how many stars it has? Sentence6: I'm interested in finding an expensive guesthouse to stay at during my visit to Cambridge Sentence7: There is one in the east. It is express by holiday inn cambridge. Do you need a booking? Sentence8: It is 01223866800. May I help with anything else? Sentence9: It has 2 stars. Is there anything else I can do for you? Sentence10: I'm sorry I don't have any matches. Should we try a different price range? Sentence11: I have expensive hotels in the east, centre, and south areas of town. Do you have a preference? Sentence12: It is a 2 star hotel. Would you like me to make those reservations? Sentence13: No, what is the phone number for the hotel? Sentence14: Does the Holiday Inn Cambridge have free parking? I forgot to tell you I need that. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User