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 am sorry, I have not found any Austrian restaurants in the area. Would you like to look for a different cuisine? Sentence2: No, you have been most helpful with the restaurant and lodging. Thank you. Goodbye. Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is BVTK5H3X . Do you need assistance with anything else? Sentence4: Great, thanks! And yes, I'm also looking for a place to stay, also located in the centre and with free wifi. Sentence5: No how about trying to look for Chinese food? Sentence6: No, thank you. Sentence7: Thank you for all your help. Sentence8: I would like one that is moderately priced. Sentence9: Is there a certain price range or rating you would like? Or would you like me to make a recommendation? Sentence10: How about the gonville hotel? It has free wifi and parking. Sentence11: That would be fine please book that for 4 nights on the same day and for the same people. Sentence12: Will that be all for today? Sentence13: There are 17 options for chinese, anything i can do to narrow that down for you? Sentence14: Booking was successful.Reference number is : MP576WVK . Sentence15: Are there any restaurants in the centre that offer Austrian cuisine? Sentence16: Can I help you with anything else today? Sentence17: No particular price range. Yes, I would appreciate a recommendation. Sentence18: That sounds great. Can you make a reservation for Thursday for 8 guests at 16:45 please? Sentence19: You're welcome. Have a great day! Sentence20: There are three Chinese places in the centre with a moderate price range. May I suggest The Jinling Noodle Bar? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System