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: It doesn't matter, should be cheap and has four stars. Sentence2: Yes, but the place needs to have free wifi as well. Sentence3: I would recommend the four-star Alexander Bed and Breakfast. It is a cheap offering in the centre and it has wifi. Sentence4: Their address is 56 Saint Barnabas Road. Anything else I can help with? Sentence5: You're in luck, I have 6 guesthouses and 2 hotels that are cheap with a 4 star rating. Would you be interested in booking a room? Sentence6: I will just need number of people staying and number of nights and your arrival date. Sentence7: pick one for me and book for 2 people at 12:00 on Wednesday. Sentence8: I looking as well for a restaurant, in the same price range as the hotel. Located in the centre. Sentence9: Yes, I am ready for a reservation. Sentence10: Actually, I just need the address of the hotel. Sentence11: They do, they are located in the centre. Would you like me to make you a reservation? Sentence12: do they have free parking? Sentence13: Hi, I'm looking for a cheap place to sleep, please. Sentence14: Charlie chan is a nice place I will book it for you Sentence15: There are 15 different restaurants that meet that criteria, is there a type of food you're interested in to narrow your choices down? Sentence16: What area of Cambridge will you be staying in? We have multiple hotels to choose from. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System