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, thank you so much! Sentence2: Sure! What will be you departing and arriving destinations? Sentence3: Is there anything else I can help you with? Sentence4: The booking was successful. Reference number is : GOJIRRQ4 . Sentence5: We have several hotels, including one in the South, the same area as the restaurant. It is expensive, but we have others in other areas as well. Sentence6: I would like to arrive before 19:30. Sentence7: Totally understand that. When would you like to arrive? Sentence8: That sounds great! I need to book for 3 people on Friday at 19:30. I will need a reference number. Sentence9: Yes, I would like to book a taxi. Sentence10: No, that will be all. Thank you for your help! Sentence11: no, just get postcode, address, and star of the hotel. Sentence12: Yes, I need a place to stay. It needs to be a hotel and doesn't not need to have free parking. Sentence13: There is one mexican restaurant in the expensive range, chiquito restaurant bar. Would you like more information or a booking? Sentence14: a yellow toyota will be picking you up and the contact number is 07656739082, anything else today? Sentence15: Thank you for using our system today! Sentence16: I am looking to eat at an expensively priced mexican place. Can you help me? Sentence17: From the cambridge belfry to chiquito restaurant bar. We won't be fit to drive! Sentence18: The cambridge belfry is a chear foru star hotel, would you like me to book you? Sentence19: it is 4 star and the address is back lane, cambourne, the post code is cb236bw. is there something else i could help you with? Sentence20: I need it to be cheap with free wifi. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User