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: yes i am rich I need expensive Sentence2: Yes, I'm celebrating a special occasion, so money is no object. Is A and B an expensive, 4-star guesthouse? Sentence3: We have 19 trains that meet that criteria, where will you be departing from? Sentence4: Great. I'm glad I could be of help. Sentence5: Will you only need 1 ticket? The train will leave Cambridge at 15:36. Sentence6: Thank you for calling. Sentence7: Have a nice day. Sentence8: the travel time is 79 minutes. anything else today? Sentence9: I don't have a expensive guesthouse. Sentence10: No. Thanks. Sentence11: Yes please book TR6524 on tuesday leaving at 14:45 going to norwich from cambridge. Please confirm departure time. Thank you. Sentence12: Yes please, I'm looking for a guesthouse with free wifi. The area doesn't matter. Sentence13: There are a few available. I highly suggest the University Arms Hotel. Would you like to book a room? Sentence14: I found a result for A and B Guest House in east that has internet. Would you like more info? Sentence15: how about a hotel type instead? Sentence16: Yes, please book for 5 people, for 4 nights starting on friday. Sentence17: I just need the train travel time , please. Sentence18: Hello, I need to take a train to Norwich on Tuesday, can you please tell me what's available? Sentence19: Booking was successful the Reference number is : ECPE3KUV . Is there anything else I can assist you with? Sentence20: Train TR6524 would work for you. Would you like me to book you passage? Sentence21: cambridge and should leave after 14:45 Sentence22: A and B guesthouse is moderately priced. Could you like an expensive guesthouse instead? Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System