Career Day Bummer

In the 6th grade at my school we do a Career Day, it's where 6th graders job shadow a parent or family friend. It's on May 6th and I told my dad got all the permission slips and info. forms filled out etc. Well, my dad knew he had 2 business trips that month and told me he would work around that day and make sure I would be able to come. Trent got to go with my dad for Career Day. He's a chemical engineer; which involves my best and favorite subjects Math and Science! But this part really sucks, my mom was asking when my dad has his business trips in May (just to make sure he is here on Garrett's birthday) he said the first week and some other week; me, in the room at the moment went to a calendar and asked, "Are you going to be here on May 6th?" his reply, " nope." Leaving me heart-broken and hurt. He PROMISED (well technically) and said he would make sure he was here... nope. Then, causes me to get angry and in a pillar of darkness and despair. I was hurt and upset, mostly because we had already sent the business letters to our job shadower's supervisor letters to ask if we could come and follow our parents (or family friend's) around their work; we wrote it in pen and it took me like 10 times just to get it right! So, me all bummed out and already thinking what am I honestly going to do now? Though... luckily I have the most bestest friend (and her dad) ever!!! I asked if I could job shadow my dentist and bestest family friend if I could job shadow him (well my bestest friend ever asked for me but anyway) and he said yes!!! So, now I am getting all the Career Day forms filled out again. But, at least I am with my bestest friend and my favorite dentist ever on Career Day (he is my only dentist I've had)!!!