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: Sorry, there are no polish restaurants in town. Perhaps you'd like to try a different type of food? Sentence2: I was able to book a grey lexus phone number is 07863299997 Sentence3: That's awesome. Thanks. I think that will do it for today. Goodbye. Sentence4: It's an attraction in town. Can you find it by name? I just need their phone number and the cost. Sentence5: Sure, we have la tasca, and la raza. Can I book one for you, if so for how many people and what date? Sentence6: Terrific! I also need a taxi that will get me from Byard to my restaurant by the reservation time, please. Sentence7: Could you find one that serves spanish food, instead? Sentence8: I am looking for a polish restaurant that is in the moderate price range. Sentence9: You have a table and it will be held for 15 minutes. The reference number is 42Z6AY64 . Can I be of further assistance? Sentence10: you are welcome to use our services anytime. Sentence11: I will try la tasca. The booking is just for me on Monday at 15:30. Sentence12: Sure! The cost is free and their phone number is 01223464646. Sentence13: What type of place is that? Sentence14: I also need to find a place called Byard Art. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System