You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Please have a taxi pick me up from the hotel at 13:00 and take me to the boat attraction. Send me car type and contact number. Sentence2: I would prefer a guesthouse that includes free parking. Sentence3: I am also looking for some places to go in the north. Any Recommendations? Sentence4: Your booking was completed. The car will be a grey volkswagen and the contact number is 07010971496. Sentence5: i am looking for a place to stay. The hotel should have a star of 4 and should be in the cheap price range. Sentence6: You would love the Allenbell guesthouse. It meets your criteria. Would you like me to book you a reservation? Sentence7: That sounds good. Can you give me the phone number and address for there? Sentence8: There are 8 hotels that meet your requirements. Do you prefer a hotel or guesthouse? Sentence9: The address is cambridge passenger cruisers, jubilee house. Their phone number is 01223902091. Is there anything else I can assist you with today? Sentence10: Ok. I was able to take care of that for you, Your reference number is 5JNUY73K . Sentence11: Would you like to go boating? riverboat georgina is in the north Sentence12: Thank you for the assistance. I believe we are finished. Sentence13: Yes please go ahead and book for 5 people for 5 nights starting from Tuesday. Sentence14: Have a wonderful time. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User