Thanks, and btw, when I ready to book at 10:30am est this morning, my reservation on CZ part is missing, i was advise the reservation is on hold till mid night today and it just poof... disappeared.
I suspected that the CZ time zone is hit 12am on 26 at the time when I try to book the flight.. (this might be the reason or CZ can pulll their booking that on hold from dl system?

I need to call delta to get everything back.. unfortunally, agents are not know how to find cz flight, and I called more than 10 times.. and still missing my return portion, which mean I am almost back to origin now.. and call tech and he does not able to helps.. so I will have to call later and hope someone know how to work on this .

NOTE: I found WANDR.me is very accurate in inventory, and still see the flight that I need and just hope someone know how to do it.