Dear Dear...
Have you had your lunch yet?
I hope you had a proper and nice meal...
The weather is very warm so remember to drink plenty of water ok?
What are you doing right now?
Try to be at somewhere cooling, rest and relax...
The heat is crazy outside and you probably won't be feeling well from it...
So try to refrain yourself from any outdoor activities...
I'm still working on my case...
I'm sorry I couldn't be there with you for lunch...
And I'm not sure how long it is going to take...
But I'll make it up to you over dinner ok?
I'll catch up with you later...
