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: The alexander bed and breakfast is a cheap hotel in the centre area with free parking. Do you want me to book it? Sentence2: Starting from sunday, please. Sentence3: Thanks for you're help. May I also have the address and phone number of the restaurant. Sentence4: Thanks can I also get a restaurant? I am looking for one in the centre of town serving korean food Sentence5: Which three nights would you like me to book the hotel for? Sentence6: There are many options to choose from but all of them are guesthouses except one. Do you need a hotel or can it be a guesthouse? Sentence7: Not a problem. You will be picked up by a white volvo, contact number 07532822307. Sentence8: Hi, I am looking for a cheap 4-star hotel near local restaurants. Sentence9: No problem. Your booking was successful for four people, starting Sunday for three days. Your reference number is 3BUQP529 . Sentence10: No, but I will need a taxi to the restaurant. I'll need to get from the Alexander B&B to Little Seoul, leaving the hotel at 13:30. Sentence11: Yes, please book it for 4 people and 3 nights. Sentence12: Of course, have a nice day! Sentence13: I don't mind what type of hotel. But it needs to be in the centre and offer free parking. Sentence14: Thank you for all your help! Sentence15: The only Korean restaurant in the center of town is Little Seoul. It's expensive, but very good. Would you like to book a table there? Sentence16: The phone number is 01223308681 and their address is 108 Regent Street City Centre. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System