Unable to reset my MacBook Air due to an unknown error

Do you happen to know the MacBook Air's specific model designation?

To expand on that code, a number of network conditions can prevent communicating with Apple's servers. Grant Bennet-Alder posted a comprehensive summary of likely reasons here: Error Message during macOS Upgrade and Reinstallation - Apple Community

Quote:

Common problems include:

Hidden Network-name

required use of a proxy server to get Internet access

required use of a login page to get Internet access

Use of a login server or certificate to get Internet access

Use of PPPoE in the Mac to get Internet access (typically only applies to DSL)

Use of Fixed IP address rather than good old DHCP

Variance of the Time by more than five minutes. if your battery has run flat, the time will likely be wonky and have to be specified with a Terminal command

Failure of Router to provide workable DNS server addresses, or providing 0.0.0.0 [may produce -2002f]

If you have an Ethernet port, you may in some cases be able to move your Mac close to the Router and connect to the Router using Ethernet.

The higher the number, the more obscure the problem.

If your battery was completely depleted, the Date&Time could have reverted to the default, which will not work. There is a terminal command to reset to current Internet Date&Time -- post back for assistance.

If your Mac starts up to error -1008F

If your Mac starts up to error -1008F - Apple Support

That particular code happens to correspond to a generic "can't communicate with Apple" message. What is it you would like to do with that MacBook Air? Describe the reasons for resetting it.