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: Thank you for using our service today, and have a wonderful stay in Cambridge! Sentence2: Are there any hotels in the same price range? Sentence3: Yes, in west Cambridge. Sentence4: I cannot find anything in cambridge. Sentence5: Can you find me a 3 star hotel with free wi-fi? Sentence6: What day are you beginning your stay? How many days and how many people do you want to make a booking for? Sentence7: I need it for 4 people for 4 nights starting Monday please. Sentence8: yes, please and be sure to provide me the booking number, thank you. Sentence9: That will be all. Thank you for your help. Sentence10: I found Hobsons House guesthouse in the west. It is a 3 star moderate and has free internet. Can I book it for you? Sentence11: The lensfield hotel is expensive and has a 3 star rating. Sentence12: The Hobson in not open, but I have the Hamilton open, would you like me too book it, it fits the same criteria. Sentence13: I have 3 guesthouses all in the moderate price range. Is there a particular area you wish to stay in? Sentence14: Is there a guesthouse available? Sentence15: Yes please and I need the reference number Sentence16: Great. You're all booked and your reference number is UMRJOUWZ . Anything else I can do for you? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System