If you need to verify that your audience members is over 18 or want to send a broadcast message to wish your audience members happy birthday, you can ask for their date of birth.
To capture company name:
1. When creating your campaign, click Add Data Capture Message. 
2. Select Birthday/Birthdate.
3. Customize your message. The following text will be added at the end of your message:
"Please text your birthdate in MM/DD/YYYY format."
4. Select when to send the follow-up message and customize your follow-up message.
5. Click Update & Save.