You can customize your greeting to make it formal or informal according to your need.
Please follow the below instruction to add the first name to your thank you email.
Step.1 Login to the application.
Step.2 Click on Settings > Email settings > Thank you email settings.
Step.3 Add {first-name} value, wherever you want to show the first name of the registrar.
If you have any questions or concerns, kindly reach out to our support team.