Teacher:You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Do you have anything in the east? Sentence2: OK, I'm all set here. Thanks for your help. Sentence3: You can change any other criteria, but the price range should be the same as the city centre north b and b. Please try again. Sentence4: Unfortunately the booking was unsuccessful, would you like to try another hotel? Sentence5: The city centre north b and b meets your criteria. Do you want to make a reservation? Sentence6: Nothing else is available on the cheap side. Something else perhaps? I am sorry. Sentence7: Booking was successful at worth house. Reference number is : E2KQ4G5L . Sentence8: The address is 152 chesterton road. Sentence9: There is nothing in the east with zero stars and free parking. Do you want to change the star rating or other criteria? Sentence10: Yes, I have two guesthouses that fit that criteria. Would you like to stay in the north or centre? Sentence11: Yes, I would like to make a reservation on Saturday for 6 people and we will be staying for 2 nights. Sentence12: Yes i would like something in the same pricerange. Sentence13: No can you please check in the north instead then? Sentence14: That's great. Thanks. Do you have their address? Sentence15: Hello! I'm looking for a place to stay with free parking and zero stars. Sentence16: Enjoy your stay at the worth house. Have a great day. Question: Who has spoken the sentence 1? (A) User (B) System
Student:
Answer: (B) System