Go to the Enquiry that you wish to lose and select Edit.
Click on the Room Stay in the Enquiry that you wish to lose.
This will give you a number of options, one of which will be to Lose the Enquiry. Click on this button.
Select a reason for losing the Enquiry. These reasons can be set up in the Admin section, under Booking Settings.
Enter some notes if you wish, and select Confirm.
You will see that the Room Stay has now moved to Lost status.