Saying "hyphen" will produce -
Saying "en dash" will produce – (often used between numbers for example 2016–2017)
Saying "em dash" will produce — 
When to use an em dash

​To change the properties of these vocabulary items, eg if you don't want any spaces before and after the en dash:

1. Say Edit vocabulary"
2. Type an en dash in the Search for field
3. Click or say "Properties"
4. Change spaces before and after the dash to 0 if that is your preference
5. Clik or say "OK"​

For more information on Dragon, the workbooks are a good place to start…

Dragon 15 workbook
Dragon 14 workbook
Dragon 13 workbook

​If you are experiencing difficulty with recognition of "Wake up", avoid running the words together and insert a micro pause between each word. However don't pause too much between each word — although Dragon needs to hear each word separately, it needs to hear the phrase as a unit, without a long pause between each word. 

As an alternative, you could try "Listen to me". If you stress the word 'to', this tends to force pronunciation of each word separately, rather than running the words together.

These phrases are often misrecognised by Dragon if the words are run together.