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'm sure I will. Thank you. Sentence2: Is there anything else I can help you with? Sentence3: Autumn House is booked for you. 1 person staying 2 nights starting on Thursday. Your Reference number is : 8YGNKA7F . Can I assist you with anything else? Sentence4: Thank you very much! Sentence5: Could you book it for the same group of people and 2 nights starting from the same day. Sentence6: Ok, I can handle that for you. How many people will dining with you? Sentence7: Sure, I recommend Autumn House. It is on 710 Newmarket Road and is very popular. Sentence8: it's located in the centre. Sentence9: Okay, I was able to book a table for you. Reference number is : 1793CE4C . Can I help with anything else? Sentence10: There are several guest houses with 4 stars in the east. They are in the cheap and moderate price ranges. Do you have a preference? Sentence11: Great I would like to book a table. Sentence12: Could you please also find a taxi to commute between the hotel and restaurant. Sentence13: Thank you! I also need a guesthouse to stay in in the east. It doesn't have to have free parking, but I would like a 4 star place. Sentence14: No that's all! Thanks for the help. Sentence15: What time frame would you like it to be in? Sentence16: Okay. Your booking is completed. The car type is red Honda. The contact number is 07940318761. Sentence17: No preference. Could you pick one for me? Sentence18: I would to book a taxi that will arrive at the restaurant by 12:30. Sentence19: Where is this saffron brasserie located? Sentence20: You're welcome, have a great day! Sentence21: You are very welcome, enjoy. Sentence22: Well...I don't have any friends... I'll be going in on Thursday at 12:30. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System