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: Is there a particular time you'd like to leave or arrive by? Sentence2: I just needed the info, no booking just yet. Thanks! goodbye. Sentence3: You are welcome. Have a wonderful day. Goodbye. Sentence4: Thank you for using or system. Good bye. Sentence5: Yes let's go ahead and make it for just 1 night then. Sentence6: Booking was successful. Your reference number is AAO2UA2S . Can I help you with anything else? Sentence7: Have a great day Sentence8: I have the a and b guesthouse that has wifi and is moderately priced. Sentence9: I actually need a place to stay as well. Something in the east please. Sentence10: No, that should do it! Thank you very much for your help. Sentence11: Booking was unsuccessful. Would you like to check in on a different day or shorten your stay? Sentence12: We have 6 guesthouses and one hotel on the eastside, you looking for any specific amenities or have a price range in mind? Sentence13: Thank you and have a great day. Sentence14: Sounds great, could you book it for 3 people for 2 nights starting on the same day as my train? Sentence15: Ok I can book you on TR8177 from Kings lynn to Cambridge on Tuesday. How many seats do you need? Sentence16: I'd like a train leaving on Tuesday from Kings Lynn, please. Sentence17: I would like to arrive in cambridge by 17:30. Sentence18: I am looking for something that is moderately priced with free wifi. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User