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 have several options for you. Is there a particular area you're looking for? Sentence2: I'd like international food, please. Sentence3: I have 3 such places available. Allenbell, Autumn House, and Leverton House. Which guesthouse do you prefer? Sentence4: no thanks,thats all for now Sentence5: In the east, please. Something inexpensive, with free parking. Sentence6: Sure, I can help you with that. Was there a specific type of food you were looking for? Sentence7: The missing sock is a cheap international restaurant in the east. Will that work for you? Sentence8: Have a lovely day, goodbye! Sentence9: There are 5 people in my group and we will be staying 2 nights. Sentence10: Booking was successful. The table will be reserved for 15 minutes. Reference number is : YCXB5JQE . Will there be anything else today? Sentence11: If the allenbell is cheap, I would like to book ti for tuesday. Sentence12: How many days will you be staying and will there be other travellers with you? Sentence13: Okay, I have you booked for 5 people, 2 days, beginning on Tuesday. Your reference number is UFT1H00C . Can I help you with anything else? Sentence14: Can you make a reservation for Tuesday for 5 people at 17:15? Sentence15: Yes! Can you help me find a restaurant near the hotel? Sentence16: I need a guesthouse. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System