Dress Code two night cruise? 3 calls, 3 different answers!

[LovetheSea]

We have booked a short two night cruise on the Infinity for May 28 out of Vancouver B.C. This is the first time we have ever been on a short cruise with Celebrity. I called them today and asked what we will be wearing. The first gal told me one casual and one semi formal. Just to be sure I called right back and asked another of their reps. He told me two casual. O.K. so now I had to call one more time to see if I was told the same thing again. This time a different gal told me one formal and one casual. It looks like I will have to take the BIG suitcase and pack everything, just in case! My husband would really like to know if he needs to bring a suit, or not?

Have any of you ever been on a short two day with Celebrity before? Did they have a formal night?