100 Business Email Sentences - Reference to telephone conversation

关(guān)于(yú)我(wǒ)们(men)今(jīn)天(tiān)在(zài)电(diàn)话(huà)中(zhōng)的(de)谈(tán)话(huà)…
With reference to our telephone conversation today... 
Note:关(guān)于(yú)=with reference to 电(diàn)话(huà)=telephone 谈(tán)话(huà)=conversation 
Example: 
关(guān)于(yú)我(wǒ)们(men)今(jīn)天(tiān)在(zài)电(diàn)话(huà)中(zhōng)的(de)谈(tán)话(huà)，有(yǒu)一(yī)点(diǎn)我(wǒ)想(xiǎng)明(míng)确(què)一(yí)下(xià)。
With reference to our telephone conversation today, I want to clarify one thing.