Air Plane Control Script

Hi, I'm just trying to make some simple script to make an Air Plane go to heading (or relative angle from it's position) and altitude, it's doesn't need to use some physics just rotating y axis with some banking (z axis) animation and rotating z axis with some pitching (x axis) animation. But I'm really lost in this situation, can you please give me some sample script or workaround?

It would be nice if I can solve this function

 // relative angle from present heading
 // altitude absolute from y = 0
 // this function will control transform of it self
 void FlyTo(float angle, float altitude)
 {
     //
 }