taaa kendisii buyrun benimm

 Literally ; 

taa kendisi --> his very self

buyrun --> yes please, go ahead....etc..

benim --> [in this case] it is me

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this is kind of "phatic expressions" that can be translated something like ;

it is certainly [very] him [me] , yes, [it is me] how can I help you ? [go ahead]

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it is very me that you are talking to now, go on please ..

Yes, you guessed it , it is me !!! , how can I help you ? ..

The possible conversation might be something like ;

A. Ali , sen misin ? [ Ali, is that you ?]

B. Yes, you guessed it ..[ you spot on !, it is certainly me [it is very him[me] ]

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"context " is important too...I just gave possibilities..May be an english native speaker can make it flow nature in English.

Thanks so much Tunci