Apex domains cannot have CNAME records.
Question and response
Question
dig planmytrav.com. NS
Answer
planmytrav.com. 1 NS ns-558.awsdns-05.net.
planmytrav.com. 1 NS ns-1774.awsdns-29.co.uk.
planmytrav.com. 1 NS ns-922.awsdns-51.net.
planmytrav.com. 1 NS ns-1778.awsdns-30.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0