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: We have many hotels to choose from. Is there a particular area of the city you would like to stay in? Sentence2: I need a particular hotel please. Sentence3: Yes. Please try to make a reservation in the same price range. Sentence4: No problem. Have a nice stay. Bye. Sentence5: I'm sorry but I was unable to book for those nights. Would you like to try a different hotel? Sentence6: No I want to book starting on Wednesday for 2 people for 2 nights Sentence7: I have found The Lensfield Hotel located on 53-57 Lensfield Road. Would you like to book now? Sentence8: To make sure I get the booking right, by the weekend you mean you want to stay for two nights starting Saturday? And how many people will be staying? Sentence9: yes for the weekend Sentence10: I don't know. But I do know the name of the hotel. It's the Lensdield Hotel. I must book that exact hotel. It is important. Sentence11: You are booked into express by holiday inn Cambridge which is in the expensive price range you wanted. The reference number is IC7AAXP6 . Is there anything else? Sentence12: No, that's it! I appreciate your help! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User