Thanks Pink....
Kisses and hugs...

Indefinite Article - A /An

It's used in singular

A- before a consonant sound

a helicopter
a teacher
a university - The vowel u has a consonant sound

AN- before a vowel sound

an actress
an orange
an hour - The consonant h has a vowel sound

How to introduce yourself to a person

Formal Introductions:

Title:

Mr. - man married or single;
Mrs. - woman married;
Miss. - woman single;
Ms. - woman single or married - It's more polite if you don't know.

E.g. Good morning! I'm Mr. Sanchez.

Informal Introductions:

Use your name. E.g. Hi! My name is Linda.