I would like to write a letter to an executive secretary requesting meeting with his/her CEO.
Dear Ms [ ]
I hope you are well.
As per our conversation over the phone, Dr ABC & Mr XYZ would like to meet with Mr BCA. Kindly let us know if he could allocate sometime either of the following mentioned days of this week.
Wednesday, [Month] [Day], 2014 during 2 PM to 5PM
Afternoon Thursday, [Month] [Day], 2014 during 2 PM to 5PM
Any time on Friday, [Month] [Day], 2014
I look forward to your reply.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.