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: Ok, let's get rooms for 7 people for 5 nights. I'll need it from Monday please. Sentence2: It does have free parking and wifi. Sentence3: The Cambridge Belfry is the only place that matches all of your criteria. Would you like to reserve a room? Sentence4: Ok there is one leaving earlier i will book it for and send you the infomation Sentence5: I'm not sure yet. Does it have free parking? Sentence6: Absolutely, What time would you like to leave? And, I assume you will be leaving from Cambridge? Sentence7: Great! What can i help you find? Sentence8: place to stay a hotel should have a star of 4 in the West and cheap Sentence9: The train should arrive by 14:15 Sentence10: I am planning a trip in Cambridge Sentence11: Your booking was successful and the reference number is C505YX1I . Is there anything else I can do for you? Sentence12: Yes, I need a train on Tuesday going to Birmingham New Street. Can you find me one? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System