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'm sorry, I wasn't thinking clearly. I'm looking for a place in the West. I need free wifi as well, please. Sentence2: Sure. The phone number is 01223314960 and it's located at 98 King Street at CB11LN. Sentence3: I need to book 4 people for 5 nights starting friday please Sentence4: Your booking was successful with a reference number EGRKXU88 . Do you need anything else? Sentence5: No, that is all the help I will need today. Sentence6: There are four places to stay in the west that provide internet. What price range would you prefer? Sentence7: Yes, there are two when will you need the room? Sentence8: I'm sorry, but I wasn't able to book for 5 nights. Would you be able to stay a different day, or for a shorter stay? Sentence9: I don't mind cheap as long as it's still reasonably nice. Sentence10: I recommend Finches Bed & Breakfast. It's cheap, but still 4 stars. Would you like a reservation? Sentence11: Thank you so much for all your help! Sentence12: Okay can you provide me with their address, phone number and postcode please? Sentence13: It was a pleasure assisting you. Have a good evening. Sentence14: I assume you mean the center of town? We have many hotels in Cambridge covering all price ranges. Sentence15: You are very welcome. Can I help you with anything else? Sentence16: Does one of those two have free parking? If so, I'll book it for 4 people for 5 nights starting Friday. Sentence17: Can you try just one night? Sentence18: They both have free parking and internet. Would you prefer cheap or moderate priced? Sentence19: Yes, I'm also looking for a museum in the centre of town. Sentence20: How about the Broughton House Gallery? Sentence21: I don't care about the price range, but do you have one that is a guesthouse? Sentence22: I need a hotel close to downtown Cambridge please. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User