conditional information in Email

conditional information in Email

Hi,
I use CREATOR forms and its Set E-Mail Notification (under More Actions Menu). I can insert any form fields in the e-mail. I want to replace the information from the field depending on the value of the field in the mail message
 
Here is the example
 
If the value of input.field1 equals/includes etc "Yes" then
    I want to place the text "You are joining to the party"
else
   I want to place  the text "You are njoining to the party"
 
into the mail message
 
Is this possible?
Regards,
Aydogan