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: I was able to book you, your reference number is HOR1CR41 . Any other questions today? Sentence2: Book it please! Can you also provide a reference number? thanks! Sentence3: Hello! I am looking for a play stay, I would like it in the expensive range and to stay in the north Sentence4: I am very sorry there are no results for an expensive hotel in the north area, would you like to try a different area or price range? Sentence5: Yes, but I need the day that you will be arriving first. Sentence6: I have 2 options here. May I suggest ashley hotel? Shall I go ahead with the booking? Sentence7: A hotel, please. For 4 people and 4 nights. Sentence8: Please book for 4 people and 4 nights starting from tuesday. Sentence9: I'm showing several guesthouses and two hotels in the north area and all have internet and parking. Would you prefer a guesthouse or hotel? Sentence10: Yes, I just double checked for you. There are some in the moderate price range if you're interested? Sentence11: Nope. Thank you so much for your help. Sentence12: It was a pleasure to assist you. Thank you for using our service. Goodbye. Sentence13: Are you sure there is no place to stay that is expensive and in the north? Sentence14: Yes please. An expensive hotel in the north with free parking and free internet. Can you book the room for me please? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System