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: I ahve two places, Chines and Portuguese, which would you prefer? Sentence2: Hi, I'm looking for a cheap restaurant in the south. What do you have? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : VMFXYH18 . Sentence4: Any other hotels? Sentence5: i am also looking for a hotel that includes free wifi. Sentence6: I would like to book a room for 5 nights for 5 people starting the same day. Sentence7: I'm sorry I was unable to book that. Would you like to try another venue? Sentence8: I would like to book for the lensfield hotel for 5 people from the same day but for 3 nights only then. Sentence9: Yes. Can you book me a take for 5 at 18:00 on monday? Sentence10: I only see the lensfield hotel, maybe we can try with other dates? Sentence11: That would be The Lucky Star located at Cambridge Leisure Park, Clifton Way, Cherry Hinton. Can I book a table for you? Sentence12: That's all I need. Thank you for your help! Sentence13: I definitely want a hotel, not a guest house. It should also be in the same area as the The Lucky Star restaurant. Sentence14: Booking for 3 nights was a success! Your reference number is ZE9TPUSJ . Is there anything else I can help you with today? Sentence15: There are many hotels and guest houses. Do you preder a certain location and price range? Sentence16: It was a pleasure to help. Thanks for using our service. Have a great night. Goodbye. Sentence17: The Lensfield Hotel is in the south and falls in the expensive price range. They're a 3 star establishment with free wifi and parking. Care to book a room? Sentence18: Chinese would be great. Sentence19: Can we try 17:00? Sentence20: Unfortunately, I was not able to book it for monday. Did you have another day in mind? Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User