one liner

delema.rb

require 'CSV'
require 'time'

calls = []
myhash = {:user => "", :date => "", :call => "", :start_time => "", :end_time => ""}

CSV.foreach('cdr.txt', :headers => false) do |row|
    next if row[9].nil? || row[10].nil?
    date = Time.parse(row[9])
    itime = date.strftime("%l:%M:%S %p")
    otime = Time.parse(row[10]).strftime("%l:%M:%S %p")

    calls << [if row[122].empty?; "UNKNOWN" else row[122] end, date.strftime("%A %e, %B %Y"), row[13], itime, otime]
end

# for irb
calls
[{:user => "UNKNOWN", :date => "Tuesday 12, May 2015", :call => "originate", :start_time => "1:46:43 PM", :end_time => "1:47:44 PM"}, ...]