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: You got it, your reference is RPXVZ9Z2 . Thank you. Sentence2: You are welcome. Goodbye. Sentence3: It really doesn't matter but I'll need to know if the particular hotel has free parking and internet please. Sentence4: Can you book a table for four on Thursday at 16:00? Sentence5: I have nine guesthouses fitting this description. Do you have a preference on free wifi or parking? Sentence6: Thank you for all your help. Sentence7: Are there any guest houses currently available iin the moderately priced range? Sentence8: That's completely fine! Of the 9, 7 of them have 4 stars. 6 of those 7 have internet and parking. Would you like me to book one for you? Sentence9: I will hold off on the booking for now but thank you. I am also looking for a particular restaurant called stazione restaurant and coffee bar. Can you give me details? Sentence10: There is an italian restaurant by that name that is quite expensive. It is within the town centre, and also has a coffee bar. Sentence11: Yes, I have 15 hotels that meet your needs. Would you like to narrow your search by area? Sentence12: yes I would like to be in the north with the same requirements, thank you Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User