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Before I called you, I was always preoccupying that you were available today. As you said that you were not free, I should have said when you were available and what type of cuisine would you like to eat but I didn't. Would you pardon me? I am sort of clumsy on the phone with you sometimes. I just don't know what the reason is. Mmm….I guess it is ok.

Are they correct?

Thank you
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I'm not sure what meaning you intend to convey in some of this, but here's my guess.

Before I called you I was wondering whether you would be free today. When you said you weren't free, I should have asked when you would be available and what kind of food you like, but I didn't. Sorry! I'm sometimes sort of clumsy on the phone with you. I just don't know what the reason is.

(I don't get the import of the last bit.)

CJ
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I was always preoccupying
(red is strange)