Follow these three simple tips:
1.Dress the part: even if no-one can see you. What you wear impacts the way you sit or stand and this in turn impacts how you sound.
2.Smile: smiling changes the facial muscles. This translates into a friendlier, happier voice that encourages a more favourable response.
3.Listen – don’t just speak: especially true if you have a script. Build in questions and sound REALLY interested in the responses.