Result is the duration obtained by subtracting datetime2 (second argument) from datetime1 (first argument). The result can be mapped to a string, or duration, datatype.
Note that the arrivaldatetime has been connected to datetime1 and departuredatetime to datetime2.
E.g. We want to find the difference, as a duration, between the departure and arrival times.
Result: the difference between the two is 10 hours: