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: Hi I need to book a guesthouse with free wifi in Cambridge please Sentence2: I would like one in the moderate price range. Sentence3: Anywhere in town, need two rooms for three people for 5 nights beginning on Monday next week. Can you give me a confirmation number as well, please? Sentence4: The postcode is cb21tt. Is there anything else I can help you with? Sentence5: I have the a and b guesthouse in the east that is a 4 star moderatly price guesthouse. Would you like to make reservations? Sentence6: That is everything, you were so helpful. Sentence7: I'm also looking for an attraction to go to in the centre. Do you have any recommendations? Sentence8: You're welcome, glad I could help. Sentence9: i have successfully booked. Reference number is : 7PPQG9Q1 Sentence10: Yes, I would suggest the old schools. Sentence11: Yes. I need it for three for five nights starting from Monday on. Sentence12: Great, I have several options for you. Is there an area of town you prefer? Sentence13: Excellent. What's the postcode? Sentence14: Did you have a price range in mind, or a particular section of the city? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System