The above automated messages do not sound assuring as the time is not specified in terms of hours, days, or week. Here is a good example that businesses can follow to deliver effective customer service communication.
Check out this message from a HubSpot employee that certainly turns the tables on the email sender. Right when you thought you were the one requesting action, the recipient sent back an assignment — a fun one, at least.

This is true! The nuclear option also helps the recently returned vacationer understand what is a priority and what isn’t. But, as boyd wrote, “if you just turn off your email with no warning, you're bound to piss off your friends, family, colleagues, and clients.” The blog post offers some helpful steps to make a clean break feasible — they include communicating with colleagues about the sabbatical long in advance, managing expectations of those who rely on you, creating a backdoor for true emergencies, and then, right before going away, reminding everyone about the sabbatical once again.
A. While The University of Toledo Medical Center and its operations must remain open for our patients and guests, yes – there will be a limited number of offices closed on HSC during winter break because they are academic, non-hospital or non-patient care areas. Leaders of those departments are responsible for ensuring their students, team members, customers, vendors and other stakeholders know in advance that they will be closed during winter break. Their email and voicemail messages also should inform customers of the specific closure dates.