Conditional statement inside timeout in workflow

Hi,

I am trying to change a workflow and I would appreciate some help with this point

The workflow sends reminder emails to participants who have signed up for a training course 14 days and 5 days before the course

I want to add a line that checks if the booking is confirmed before sending out the email. I can do this with one reminder but not two

The current workflow is

If booking is confirmed

Timeout until 14 days before event

     Send email

    Timeout until 5 days before event

       Send Email

I only want the email to be sent if the booking wasnt cancelled so I need to recheck if the booking is still confirmed, 

If booking is confirmed

Timeout until 14 days before event

     If booking is confirmed

         Send email

         Timeout until 5 days before event

                If booking is comfirmed

                 Send Email

This is not possible in CRM. 

I can split the two reminders into different workflows and this works. 

If booking is confirmed

Timeout until 14 days before event

     If booking is confirmed

         Send email

Is it possible to do both in one workflow ?

Thanks for any advice