Apex domains cannot have CNAME records.
Question and response
Question
dig tuvahotel.com. NS
Answer
tuvahotel.com. 5 NS ns2.tuvahotel.com.
tuvahotel.com. 5 NS ns1.tuvahotel.com.
Authority
The response has no authority records.
Additional
ns1.tuvahotel.com. 5 A 51.222.0.14
ns2.tuvahotel.com. 5 A 104.140.13.170
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0