How to replace words in any sentence

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C#

Hi guys, I must create a console application that lets a user enter any sentence and then be asked if he wants to replace a word in that sentence for example "Aliens are very real and looks scary." Ask which word does he want to replace like "very" with "not". Then ask user with yes/no question if he wants to replace another word. If yes then replace word like "scary" with "funny" if no display "Aliens are not real and looks scary." Keep on asking user if he wants to replace more words until user says "no".

My code looks like this so far...I need help with the yes/no question and then prompting user with the question again and using that in the replaced sentence ...please help me

static void Main(string[] args)
        {
            //Enter sentence
            Console.WriteLine("Enter your sentence : \n\n");
            string sSentence = Console.ReadLine();
            Console.WriteLine("\n");


            //Words to be replaced
            Console.WriteLine("Which word do you want to replace? \n");
            string sFirstWord = Console.ReadLine();
            Console.WriteLine("\n");
            Console.WriteLine("Enter the word you want to replace it with: \n");
            string sFirstWordReplace = Console.ReadLine();
            Console.WriteLine("\n");

            //
            //Not sure what to do here with yes/no
            //and redisplay questions if yes
            //

            //Call yes/no question
            AnotherOne();

            //If yes ask second word to be replaced
            Console.WriteLine("Which word do you want to replace? \n");
            string sSecondWord = Console.ReadLine();
            Console.WriteLine("\n");
            Console.WriteLine("Enter the word you want to replace it with: \n");
            string sSecondWordReplace = Console.ReadLine();
            Console.WriteLine("\n");

            //Replace the words
            string sFirst = sSentence.Replace(sFirstWord, sFirstWordReplace);
            Console.WriteLine(sFirst);

            //Exit the program
            Console.WriteLine("\n");
            Console.WriteLine("Press any key to exit");
            Console.ReadKey();
        }

        static bool AnotherOne()
        {
            while (true)
            {
                Console.WriteLine("Do you want to replace another word? \n");
                String r = (Console.ReadLine() ?? "").ToLower();
                if (r == "y")
                    return true;
                if (r == "n")
                    return false;
            }
        }