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: Booking was successful, the reference number is Y9ZD16I2, any further questions? Sentence2: The cost for the train leaving Stevenage at 13:54, arriving Cambridge at 14:43 is 10.24 pounds, would you like me to book that for you today? Sentence3: Price is not an issue for me. Please recommend one of them for me. Sentence4: the south . and make it a guesthouse with free parking also. Sentence5: I don't have a departure time preference but I would like to arrive by 15:45. Sentence6: Sure! I recommend Rosa's Bed and Breakfast. Would you like to book a room? Sentence7: I would be happy to help with your request, but first I will need to know what time you'd like to leave/arrive at. Sentence8: That is all I needed today. Sentence9: what's the train ID? Sentence10: I'd be happy to help. Which day would you like to travel? Sentence11: Thank you for calling. I hope you enjoy your trip to our town. Goodbye. Sentence12: What is the price for that one? Sentence13: i have 3 guesthouses in the south. two are moderately priced and one is cheap. which do you choose? Sentence14: There are five trains to Cambridge on Saturday- the latest arrives at 14:43. Would you like me to book it for you? Sentence15: I am looking for information and could use your help finding a train. Sentence16: What area would you like to stay in? Sentence17: TR6607. Would you like me to book you on? Sentence18: I also need a hotel. I don't care about parking but it does need free wifi. Sentence19: Yes please. I need a room for 8 and 2 nights starting from Saturday. Sentence20: I need to leave stevenage on saturday. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User