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: Find a budget hotel with free parking in Cambridge. Sentence2: Thank You. That's all i need. Sentence3: Yes I'd like to book for 5 at 13:00 on Wednesday as well. I will also need the reference number. Sentence4: I would like it to have a four star rating and be located on the west side. Sentence5: I found Thanh Binh; would you like me to make you a reservation? Sentence6: Unfortunately the booking was unsuccessful. Can you book for another day or a shorter stay? Sentence7: Have a good day, Goodbye Sentence8: Let's try 4 nights only please and I'll need a reference number. Sentence9: The Cambridge Belfry fits your requirements, would you like to book a reservation there? Sentence10: Please book it for 5 people and 5 nights starting from wednesday. Sentence11: There are 10 hotels that meet your needs. Would you like to narrow your search by area? Sentence12: Great the reference is PDELCKQS . Thank you. Sentence13: It is also in the west side area, located at 17 Magdalene Street City Centre. Would you like to make a reservation? Sentence14: First, tell me how far away from the hotel this restaurant is. Sentence15: I am also looking for a vietnamese place to dine in the same price range as the hotel. Sentence16: That works out perfectly. Your reference number is 72YCMLXX . Is there anything else I can help you with today? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User