Voice message there is voice record to my cell " its say the person you trying to reach is not available at this time.

You didn't say what type & kind of phone you have (iphone or android) or phone service you have (they all do them slightly different). If you dial your own phone number into your cell phone, that should access your voice mail. I have a Sprint Android, so

1. Press 3 for Personal Options
2. Press 2 for Greetings
3. Press 1 to Change Greeting
4. Press 1 to Record personal greeting or press 2 to select the standard greeting
5. Press # to End Recording
6. Press 1 to Confirm Greeting

Change your Sprint personal voicemail greeting

Touchscreen phones simplify the wireless world, especially when combined with voice activation. Although making calls using voice commands was an option before touchscreens became available, the method used to set up this feature is different than it is for non-touchscreen units. It can take time to master the set of procedures that will get the feature working.
Step 1
Create a voice tag. Touch "Contacts" on the today screen. This opens the list of contacts on your phone. From here, do one of three things: you can hold your finger on the desired contact and then tap the "Add Voice Tag," you can select the desired contact, tap on "Menu" and then "Add Voice Tag," or you can tap the desired contact to open their personal screen and then hit "Menu" followed by "Add Voice Tag."
Step 2
Record the voice tag on your phone. Touch the phone number to which you wish to add a voice tag then touch the "Record" button. Record your voice tag for that contact. An icon will be displayed to the right of the number when the voice tag is complete. You can listen to your voice tag by touching the "Play" button on the screen or you can delete it to record a new one.
Step 3
Make a voice tag for a program. Tap the "Start" button on the phone. Go to "Settings" and then the "Personal" tab followed by "Voice Speed Dial." Choose the program for the voice tag and record the voice tag in the same manner as you did for the contact. To open the program with the voice tag, tap "Start," "Programs" and then "Voice Speed Dial."
Step 4
Launch a program or make a call. Make a call by tapping "Start" followed by "Programs" and then "Voice Speed Dial." You will hear a beep. Say the voice tag you recorded for the person you wish to call. You can open a program via the same procedure (by speaking the voice tag created for the program).
Step 5
Check the voice tags you created. Tap on "Start," "Settings," "Personal" tab and then "Voice Speed Dial." A voice tag tab appears and displays a list of your voice tags.

Sounds like there is something physically wrong with the mic.
Try recording a message with any voice recording apps you have on the phone. You can also try voice commands such as google search via voice.
If nothing picks up, then it will be hardware.

try pressing hash instead of send ;)

Try recording with the inbuilt voice recorder.To access voice recorder go to main menu and reach the inbuilt voice recorder

I assume that you have voicemail on your plan, and your carrier or service provider supports it. First call your voicemail number and wait for the announcement as the whether or not you have any messages. Then next few steps may vary depending on your provider.Enter your password if asked, Voice will tell you you are in main menu, Select personal options number. Select personal greetings. Here you have a choice between extended absence, standard and personal. Select personal, record your greeting, and press # to keep your recorded message. These steps may vary depending on your carrier, but are generally pretty standard, if you simply follow the voice directions.

Using the answering system
remotely
1 Dial your phone number from a touch
tone phone.
2 After the greeting message starts, enter
your remote code (page 59).
LThe unit plays back new messages.
LAfter playing back new messages,
the voice guidance starts.
3 Follow the voice guidance as
necessary.
4 When finished, hang up.
Note:
LYou can ignore the voice guidance and
control the unit using remote commands

Voice guidance
During remote operation, the unit’s voice
guidance prompts you to press {1} to
perform a specific operation, or press {2}
to listen to more available operations.
Operations are presented by voice
guidance in the following order:
– Play back all messages
– Play back new messages
– Record your message
– Erase all messages
– Record your greeting message
Note:
LIf you do not press any dial keys within
10 seconds after a voice guidance
prompt, the unit disconnects your call.
LIf less than 3 minutes of recording time is
available, the unit announces the
remaining recording time after the last
message is played back.

Remote commands
You can press dial keys to access certain
answering system functions without
waiting for the voice guidance to prompt
you.
Key Remote command
{1} Repeat message (during
playback)*1
{2} Skip message (during
playback)
{4} Play new messages
{5} Play all messages
{7} Recording a greeting
message

You can download the full manual at
http://www.retrevo.com/support/Panasonic-KX-TG5776-Telephones-manual/id/1074bh748/t/2/

Please make sure to rate this solution. Thanks.

Problem solved! Turns out that my son didn't realize that you have to call your voicemail box and delete voice messages by pressing "7" on the keypad. He thought that when you pressed "erase all" on the text message menu it erased voice mail, too. So the mailbox was full, as it only holds twenty messages. Sometimes the most obvious solution is the solution!

the voice mail key is the #1 key on the keypad as well it should have an envelope icon on the keypad as well, just press and hold the #1 key and follow the step by step instructions to setup you voice mail.

If you call into your voice mail you should get passed all the messages and it will say something to the fact of personal settings.. in there you can change your greeting.