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: There are not any with wifi. Would you like me to checked higher rated options? Sentence2: No, thanks. Are you sure you can't find 1 star hotels? Sentence3: Hello, could you tell me if there are any 1 star lodging establishments that offer free wifi? Sentence4: No. I don't have a price preference. Sentence5: no that will be all. Sentence6: All right. Thank you for the Cambridge TownInfo Centre. Have a nice day. Good bye. Sentence7: Can I look up anything else for you today? Sentence8: I need a train on the same day leaving Cambridge Sentence9: In that case, I would recommend alexander bed and breakfast. Sentence10: What about 4 star hotels? Sentence11: Okay, from where? Sentence12: Your booking was successful, your reference number is: VZPWHWLV . Is there anything else I can assist you with today? Sentence13: Yes, there are quite a few. Did you have a particular price range in mind? Sentence14: Okay! Where are you going? Sentence15: That sounds great can you book it for 7 people? We're staying 3 nights and want to check in Wednesday. Sentence16: No thank you that will be all Sentence17: I'm sorry, I double checked but there are not any 1 star rated hotels available. Can I help you find something else that may be suitable? Sentence18: i am going to cambridge Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User