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: When would you like to leave the restaurant? Sentence2: Hello I am seeking a restaurant in the west side of Cambridge to eat at. Please only suggest expensive places. Sentence3: i also want a taxi to get to the hotel after the restaurant Sentence4: I was able to book a table for 7 at 15:30 on Monday. Your confirmation number is C1555WJL . Can I help you with anything else? Sentence5: I suggest Graffiti. Would you like a table there? Sentence6: Then I suggest the huntingdon marriott hotel. It is on kingfisher way, hinchinbrook business park, huntingdon. Would you like for me too book it? Sentence7: Yes, I need a place to stay. Something that is expensive and has free wifi. Sentence8: Booking completed! Booked car type : black volvo Contact number : 07237462964 Sentence9: I would like to eat British food. Sentence10: There are 9 matches. Do you have a food preference? Sentence11: Yes please. Book it for he same group of people and 3 nights starting from the same day. Sentence12: Wait, I want it to go to the restaurant by 15:30. Sentence13: Yes, please. I need a table for 7 at 15:30 on Monday. Sentence14: Booking was successful. Reference number is: VJ7YQQS7 . Is there anything else I can help you with? Sentence15: I'm not really set on an area, however, please make sure that they are a 4 star hotel with free parking. Sentence16: There are 5 expensive hotels with free wifi. Do you have a preference of area? Sentence17: Thank you for contacting the Cambridge TownInfo centre. Goodbye Sentence18: Thank you so much for all the help! Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User