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: How about the arbury lodge guesthouse? Sentence2: great day and thanks for inquiring from us Sentence3: Actually yes you can help me find a hotel on the North end that offers free parking Sentence4: I'm so sorry about that, it looks like someone left the phone off the hook, i'll hang up now. good bye. Sentence5: Do you mean from the guesthouse to the restaurant? Sentence6: The reference number is R20I7FP5 do you need help with anything else? Sentence7: I've really got to go. I am late for work. Goodbye. Sentence8: It was my pleasure. thanks a gain. Sentence9: Ok, I've booked you a taxi. It will be a white toyota, with the contact number : 07693044050 Sentence10: The Arbury Lodge is located in the north part of town, at 82 Arbury Road. Do you want to make a reservation? Sentence11: I also need to get a taxi from the guesthouse to the hotel. Sentence12: How about an expensive Korean restaurant? Sentence13: Yes, excuse me. Can you please book a taxi that will arrive there by the reservation time? Sentence14: That sounds to be a good one. May i please have their address and description of the location? Sentence15: The address for Arbury Lodge Guesthouse is 82 Arbury Road. There are no expensive North European restaurants in Cambridge. Do you want to change the food type? Sentence16: Great, thank you so much! That's everything I needed. Have a great day! Sentence17: Actually, right now, I just need to have the address. Also, I need to find a restaurant. Expensive with northern European food. Sentence18: Oh, wait. I think maybe a guesthouse would better suit our needs. Sentence19: little seoul has great food, when would you like the reservation for and for how many? Sentence20: Six people at 17:45 on Wednesday would work great. Can I get a reference number please? Sentence21: welcome all the time Sentence22: There are 11 to chose from do you have a price range you prefer? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User