It would be one of the best days as well as one of the saddest days of your life when your dearest daughter is getting married. And you must prepare a speech for her happy marriage. There comes the toughest moment, you'll have tears in your eyes but you need to deliver your speech with a smile on your face. It's quite impossible but you have to make it possible.
The speech which you prepare is not that complicated when it flows from your heart. Your heart is the best person to write the speech.