My van lost engine power while I had it operating in cruise control and travelin

The van doesn't start. It sounds like it would like to but it just won't turn over. My mechanic can only guess what the problem is after giving it an inspection. He thinks it might be the fuel pump but isn't certain. He is sure that it is not the alternator or battery. Thanks for answering.

if your mech can't tell you whats wrong maybe its time for a new one. sorry no hard feelings but it should be a fairly easy diag.