Hi Friends,
I need a simple shell script(Linux..bash shell) for the below description. Can anyone help me please. I need it very urgently. That is why
i cannot write it myself.

Objective
Create shell scripts using:
· Simple interactive menus
· Variables, functions
Description
Create a shell script, phone.sh, which maintains a phone book.
Detailed Specifications
The phone book is to be maintained as a single text file, phone.txt.·
phone.txt will be in the same directory as phone.sh.
Each line in the file will correspond with one item in the phone book.
The line will be tab delimited fields in the following format:·
Name PhoneNum Company City

Standard Usage Menu driven: the main menu has the following functions:·
Add item·
Delete item·
Search item (by name)·
List all items

Other features ·
Phone.sh may be run from any directory.
The directory name of phone.txt can not be hard coded.
Use basename/dirname command on $0 to find directory names.·Name and phone# are mandatory.
Use reusable functions for prompting and reading fields. ReadField(label, mandatoryFlag)