Working with dictionaries and keys help please!

[David D]

I have a dictionary with a 10 people, the key being a number (0-10) and the value being the people's name.  I am in the processing of Insert, Adding and deleting from the dictionary.  All seems well until I delete a person and add a new one.  The numbers (keys) do not change and so I am getting an non-sequential set of numbers for the keys.  Is there a way of performing this where the key will update so that is continues to work sequentially?  Here is what I mean

Print dictionary
{0 John, 1 David, 2 Phil, 3 Bob}

remove 1 David
{0 John, 2 Phil, 3 Bob}

How can I get it so that the VALUE will reset and it will look like this after both adding or deleting?

{0 John, 1 Phil, 2 Bob}