I have a cet host. Last week I received cet offer that I wanted to book so I sent him and email and he said he would take care of it. I included the offer numbers (for 2 seperate trips) in the mail but I did not say that according to the cet email the offer had to be booked by 12/20. I sent the orginal email on the 11th. I am just not sure if I should send him another email and tell him about the experation date.