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: Could I have the address, entrance fee, and postcode. Sentence2: Perfect. I hope you have a wonderful stay. Goodbye. Sentence3: Christ's College is on Saint Andrew's Street and postcode CB23BU. There is no entrance fee. Can I help you with anything else? Sentence4: Okay. I'd like a hotel that includes free parking then. Sentence5: There are about 33 hotels that meet your needs. Can you narrow it down to a certain area of town and price range? Sentence6: I am looking for some places to go in town. I'm so excited about seeing some of the local attractions. Sentence7: What do you recommend? I will be need the address, entrance fee, and postcode for what you recommend please. Sentence8: Please book it for 7 people for 5 nights starting Thursday. Sentence9: Sorry, parking isn't something that is mentioned for attractions. Sentence10: I honestly recommend visiting a famous college such as Christs or Magdalene. Sentence11: Yes, I'm also looking for a place to stay. The hotel doesn't need to include internet. Sentence12: Great I also need a taxi to commute between the two places. Sentence13: There are many to choose from! Almost 80. Can you tell me if you have a certain type of place you want to visit? Sentence14: Yes it is in the centre. Sentence15: I've got a ride for you. A yellow Skoda. Their phone number is 07546403281 Sentence16: I'm sorry,was Christ's College in the centre? I did need something in that area. Sentence17: Is there one in the centre with free parking Sentence18: Where will you be leaving from? What time would you like to leave? Sentence19: Great, thanks! That's everything I needed. Sentence20: I have your rooms booked. The reference number is : OGBAZ8XW . KIs there anything else i can assist you with today? Sentence21: alexander bed and breakfast would meet those needs. could i look for something else? or can i book a stay here at this one? Sentence22: i want to leave by 10:45 Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User