I've given the meaning and English letters for the malayalam word below:

Hello, my name is Hayley. What is your name?
Namaskaaram, Ende' peru Hayley. Ningalude'/Ninde' peru endhanu?

Namaskaaram=Hello
Ende' = My
Peru = Name
Ningalude'/Ninde' both mean 'your'. Ningalude is used when the person you are speaking to is a lot older or with respect.
Ninde is used informally and among people of your own age group or younger.
Endhanu=What

Hope this helps you Hayley.

Normally greetings in the way of 'hello' in english is not used in malayalam. The namaskaram above is greetings but generally not used.

In more more simple terms it goes like this.
'Ente peru hayley, ningalude perendhanu?'

'ningalude' is 'your' in english but with respect. There is another 'your' which is 'ninte' and is normally used to address a person who is younger or equal like friends. (ninte perendhanu?).

Towards elderly it should be always ' ningalude' (formal or informal).

There is very formal word rarely used in written language 'thaangalude'.
'thaangalude perenthanu?'


If you are addressing a stranger on telephone you can use 'hello' as greeting now a days.
' hello, ente peru hayley. Ningalude perendhanu (or 'aarodanu njaan samsaarikkunnathu'- with whom am I speaking?)

Hello=namaskaaram
name=peru
is=ennanu/aanu.
Hayley=name need not be changed,so same
what=enthaanu?
your= ningalude/ninte.('ningalude' is used to show respect to the person whom you are talking to)