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: You're welcome! Have a great day! Sentence2: I was able to book a room for 3 nights. Your reference number is V96BTDAI . Sentence3: It doesn't need internet included Sentence4: I need to find a four stars hotel in the north that has indoor free parking. Sentence5: Does Worth House have free wifi? Sentence6: Oh, thank you so much. You've been most helpful. Sentence7: We have seven matches for your requirements. Do you have any additional preferences? Sentence8: Yes book me a stay for 4 people and 4 nights starting from wednesday please Sentence9: Can you see if I can get three nights? Sentence10: Oh, I'm unable to process that. Would you care for a shorter stay? Sentence11: Yes, worth house is a cheap four star guesthouse in the north area with free parking and internet. All our options for your other preferences have wifi. Would you like to reserve a room? Sentence12: I have 7 options for you. 6 are moderately priced, and 1, Worth House, has a cheap price. Would you like more information? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System