Time Zone Agent vs Clients

Time Zone Agent vs Clients

Good morning,

We seem to be having an issue with the timezone, 

All my agents are in Central America (GMT -6), but clients are in Eastern (GMT-4). 

When an agent responds, the ticket enters GMT -6), but any resonce from a client is stamped with GMT -4. Because the system \ Agent is configured to GMT -6,  responses should be converted to GMT -6.

Thanks
Rudy