Music Production for Singing Cover Video

A video of someone singing was recorded. However, the end of the video (last few verses) were recorded in a different location than the beginning. I need someone to blend the sound or whatever is needed so that you cannot hear a difference when listening to it. I need someone skilled in music production/editing to make the end of an armature singing cover video sound the same (volume/whatever else is needed) to match the rest of the video so that you can’t tell that it sounds off