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: Booking completed! Booked car type : grey bmw Contact number : 07935848087 Sentence2: Sure thing. I would suggest the old schools. Sentence3: You're right. I forgot to select an architectural sight that I wanted to visit. Could you suggest one in the city centre. Sentence4: Yes, I'll also need a taxi to commute between the two places. I'll need to be at the restaurant by 13:30, of course. Sentence5: there is no greek restaurant in the centre. can we change the location? Sentence6: Thank you, you too. Sentence7: Okay and where do you need the taxi to pick you up? Sentence8: In addition to architecture, colleges, and museums, we also have boat attractions, nightclubs, and theatres in the centre. Sentence9: I would be interested in seeing some interesting architecture. Sentence10: I need it to arrive before the 13:30 at the restaurant. Can you give me a contact number and the car type that will pick me up? Sentence11: Well, how about African food? Sentence12: No thank you though. I would like information on greek restaurants that would be in the same area as the churches you suggested, please? Sentence13: thanks that's all i need Sentence14: I can do that. I'm sorry, but can you clarify your departure site? It appears it would be a location in the centre? Sentence15: Bedouin is an expensive serving african food in the centre of town. Sentence16: That sounds good, can you book 2 people at 13:30 on Tuesday. Sentence17: Can I assist you with anything further, today? Sentence18: Booking was successful. Reference number is : IA596HSH . Is there anything else I can do for you? Sentence19: That's all I need, thanks so much for all of your help! Have a great day! Sentence20: There are a few places, mainly churches, that have great architecture. Do you want information on any of those? Sentence21: Is there anything interesting to see in the centre of town? Sentence22: That sounds good, can you book the taxi from there to the restaurant? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User