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: Okay, can you tell me how many people are staying, how many days you want to stay and when you begin your stay, please? Sentence2: I am planning a trip in Cambridge Sentence3: I'm actually looking to book a specific hotel. It is called the Alpha-Milton Guest House. Sentence4: I just want to verify that train leaves from Cambridge correct? If so, can you book it for 6 people and provide the reference number. Sentence5: What area in cambridge would you like to stay? Sentence6: Ok, so you are all booked. Reference number is NM7IWBOC . Sentence7: Thanks so much. I also need a train to arrive in Peterborough by 16:45. Sentence8: I'd like to start my stay on Wednesday, it will be for two nights, and it will be 6 people. Sentence9: Alright, have a wonderful visit in Cambridge! Sentence10: Would you like to take the TR8327 on Friday, it arrives at 16:24? Sentence11: No thank you. Goodbye. Sentence12: Yes, that is correct. I have booked it for you, the reference number is IBM6BL8X and will be leaving at 15:34. Is there anything else I can help you with? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System