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: Thank you and enjoy your stay here in our lovely city! Sentence2: Nandos is a cheap Portuguese restaurant in the south, would like more information about it? Sentence3: Okay, you are booked, with reference number 58HYUWPB Sentence4: I need to book for Friday for 5 nights. Sentence5: I'm looking for a restaurant in the south serving christmas food. Can you help me? Sentence6: I have booked a red volkswagen for you. The contact number is 07404379938. Sentence7: I have one option for you. It is rosa's bed and breakfast. Would you like a reservation? Sentence8: Yes, can you help me with a cheap guesthouse in the south of town? Sentence9: No, I'd really like cheap Christmas food. How about in a different area? Sentence10: What about a place serving Portuguese food? Sentence11: There will be 7 of us. Sentence12: Yes, could I get the postcode? Sentence13: How many people will be staying? Sentence14: Sure, I can help you with the booking? On what day will you be coming in? Sentence15: Yes, please book the reservation and provide a reference number. Sentence16: I don't have anything that serves Christmas food and is cheap. Sentence17: Postcode cb17dy. Their phone and address is 01223327908, Cambridge Leisure Park Clifton Way. Can I help you with anything else? Sentence18: Thanks you have been great! Sentence19: Sorry, I couldn't find any christmas restaurants in the south. Want to try a different kind of food? Sentence20: I also want to book a taxi to leave Rosa's bed and breakfast by 15:45. I would like the contact number and car type. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System