Hello! 我係玉其～
Hello! My name is Yuki.

Cantonese Sentence Breakdown

我 ngo5
I
me
my
us
we
our
self
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
玉 juk6
jade
figurative of a woman's body
(of a woman) pure
fair
beautiful
graceful
your esteemed
precious stone
gem
a surname
其 kei4
his
her
its
their
that
such
it (refers to sth preceding it)
within
used as suffix of an adverb