You can search here to see all the flights operating between the cities and check below "Display direct and non-stop flights only" which will then list the flights from various carriers. But you would need to input the date which means you'll have to ask your friend for the date. Aircraft may not necessarily be the same everyday for certain flights while certain flights may operate at different schedules depending on day of the week while there are some flights that are not daily and only operate on certain days of the week as well.