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: it is a park. can i give you their phone numbers? Sentence2: I'm glad I could help you. Sentence3: Hello, can you recommend attractions in the Centre of town, please? Sentence4: The booking was successful. 8QCQDYFQ is your reference number for that booking. Is there anything else that I can do for you? Sentence5: Enjoy your day, goodbye. Sentence6: Certainly, I can help you with that. What time would you like to leave or arrive by? Sentence7: No thanks. Can you find a guesthouse with free parking for me? Sentence8: That narrows it down to 21 options. Would you like a particular star rating? Sentence9: Yes, I will need it for 5 nights. 2 people and starting Monday. Sentence10: Your taxi will be a yellow Volvo waiting at 11:00. The contact number for the taxi is 07072119452. May I help you with something else? Sentence11: Great that's all the info I needed today, thanks! Sentence12: There are 21 guesthouses. Do you have a preference in price range or area of town? Sentence13: I will need a taxi as well Sentence14: Not really. It's fine. Sentence15: Well, if you'll be visiting the centre, I recommend the El Shaddai. It's moderately priced with wi-fi and parking. Would you like me to make a booking for you? Sentence16: Me too. Have a nice day. Sentence17: Absolutely! My favorite place in the center of town is Cambridge University Botanic Gardens. It's beautiful there! Sentence18: That sounds great, thank you very much! What type of attraction is that? Sentence19: No, but I definitely need free wifi. Sentence20: I would like to leave the park by 11:00. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System