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 need reservations for the same group of people at 17:00 on the same day. Sentence2: No problem. I've got your taxi booked. Anything else? Sentence3: Booking was successful! Your reference number is 6ZPBNFD5 . Sentence4: The booking was successful for 2 nights at the Acorn Guest House for one person. Your Reference number is L55JCSVU . Do you need anything else? Sentence5: I hope you have a very pleasant stay in our town! Sentence6: I meant to say I need to commute between the hotel and the restaurant. Sentence7: I think that would be great. May I please book that guest house for 2 nights starting from Friday for 1 person? Sentence8: Yes I would like it to be moderately priced. Thank you. Sentence9: Can I have the contact number and car type? Sentence10: Can you also look up the sitar tandoori restaurant? Sentence11: Booking completed! Booked car type : grey bmw Contact number : 07853122848 Can I help you with anythign else? Sentence12: Great. You are so helpful. One more thing, I need a taxi to arrive at the restaurant by the booking time Sentence13: Great! Thank you so much! Sentence14: What do you have in the way of guesthouses in the north? Sentence15: Well I can recommend the Acorn Guest House that is also rated 4 stars. Sentence16: There are 9 options that would suit those criteria, do you have any other things you need for your stay or would you like a recommendation? Sentence17: I have found 11 different guesthouses in the north. Were there any certain requirements you have in searching for a particular guesthouse? Sentence18: i have their info, what would you like to know? Sentence19: I can help with that. Where would you be departing from? Sentence20: Please provide a recommendation. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System