Open the  booking module and click on the settings tab. 

You can send automatic messages:

1. You can send an automatic confirmation message after a booking was made
   • Go to the settings tab, main settings
   • Check the send confirmation message box 
   • Enter your confirmation message 
   • Click Save
2. You can send a message after approval, once you have approved the booking -> appove booking
   
   • Go to the settings tab, main settings
   • Check the send message after approval box 
   • Enter your confirmation message 
   • Click Save
3. You can send a message after disapproval -> disapprove booking
   
   • Go to the settings tab, main settings
   • Check the send message after disapproval box 
   • Enter your confirmation message 
   • Click Save